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Instrumentation amplifier with resonance amplitude-frequency characteristic Proposed amplifier incorporates the components that follow: input signal source (1), base of first input transistor (2), second input transistor (3), device output (4), first current-stabilising dipole (5), first power supply bus (6), current mirror (7), second power supply bus (8), output (9), second current-stabilising dipole (10), first correcting capacitor (11), common bus of power supplies (12), second correcting capacitor (13), input (14) and extra resistor (15). |
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Output stage of power amplifier based on complementary transistors Device comprises: first (1) and second (2) output transistors with a different type of conductivity, emitters of which are connected to the output of the device (3), a first (4) power supply bus connected to the collector of the first (1) output transistor, a second (5) power supply bus, connected to the collector of the second (2) output transistor, the input of the device (4) is connected to the gates of the first (6) and second (7) input junction field-effect transistors, the drains of which are connected to the second (5) power supply bus, the base of the first (1) output transistor is connected to the source of the first (6) input transistor and the drain of a first (8) auxiliary transistor, the gate of which is connected to the first (4) power supply bus, and the source is connected to the first (4) power supply bus, the base of the second (2) output transistor is connected to the source of the second (7) input transistor and the drain of a second (9) additional transistor, the gate of which is connected to the first (4) power supply bus, and the source is connected to the first (4) power supply bus through a first (10) circuit of series-parallel connected p-n junctions. |
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Multi-differential operational amplifier First (5) and second (8) output transistors used in a multi-differential operational amplifier are a first and a second junction field-effect transistor whose gates correspond to the base, the drains correspond to collectors and the sources correspond to emitters of the corresponding first (5) and second (8) output transistors. The collector of the first (1) input transistor is connected to a second (10) power supply bus, the drain of the second (8) output field-effect transistor is connected to a first power supply bus (7), the output of a second (9) current mirror is connected to the output of the device (11), the gate of the first (5) output field-effect transistor is connected to the second (12) non-inverting input of the device, and the gate of the second (8) output field-effect transistor is connected to the second (13) inverting input of the device. |
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Fast-response transducer of physical magnitudes with potential output Proposed transducer comprises sensor with IR and IC. Said sensor is AC connected in between the input of non-inverting buffer voltage amplifier, its output making the transducer output and power supply common bus. Transducer device is connected with the input of non-inverting buffer voltage amplifier via correction capacitor and extra non-inverting current amplifier connected in series. |
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Prevention of alternate voltage input to low-current control circuits is achieved by three-rod single-phase magnetic amplifier with protection against alternate voltage in control circuit, where control winding of the amplifier is positioned in middle rod, and semi-windings of operation power circuit are positioned on two outermost rods of three-rod core out of laminated electrical steel and are wound so that resulting flow generated by them and running through control winding was zero, and a part of middle rod of the magnetic amplifier is replaced with solid ferromagnetic insert out of low-coercivity soft magnetic iron. To increase resistance to alternate magnetic flow, a diamagnetic gap is made between solid ferromagnetic insert and laminated core of the magnetic amplifier. |
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Invention relates to radio engineering and can be used in power amplifiers of transmitters. A modulator for high-frequency key mode power amplifiers includes an envelope amplifier, a PWM converter, a high-voltage output stage, an output low-pass filter, an output stage driver which enables modulation of the high-voltage output stage and galvanic isolation between the PWM converter with low supply voltage and the high-voltage output stage. |
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High-speed capacitive load driver High-speed capacitive load driver includes an output stage, the input of which is connected to an input signal source and the output is connected to a load circuit capacitor, a voltage-to-current converter, the potential input of which is connected to the output of the output stage, the potential output is connected to a compensating circuit, the first current output is connected to the input of a first current mirror which is matched with a first power supply bus, the second current output is connected to the input of a second current mirror which is matched with a second power supply bus, current outputs of the first and second current mirrors are connected to the output of the output stage, wherein increments of current of the first and second current outputs of the voltage-to-current converter for corresponding polarities of output voltage are proportional to conductivity of the compensating circuit. |
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Controlled selective amplifier Invention relates to radio engineering, and specifically to controlled selective amplifiers. The selective amplifier comprises a signal source connected to the base of a first input transistor, a second input transistor, a first current-stabilising two-terminal element connected between the emitter of the first input transistor and a first power supply bus, a second current-stabilising two-terminal element connected between the emitter of the second input transistor and the first power supply bus, a first balancing capacitor connected between the emitter of the first and second input transistors, a first frequency-setting resistor connected between the collector of the first input transistor and a second power supply bus, a second balancing capacitor and a second frequency-setting resistor. The second balancing capacitor is connected between the base of the second input transistor and the collector of the first input transistor; the second frequency-setting resistor is connected between the base of the second input transistor, which is connected to the output of the device and a common power supply bus, wherein the frequency-setting resistor is connected in parallel via alternating current to an additional balancing capacitor. |
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Composite transistor contains an input transistor (1) which base is the base (2) and emitter is the emitter (3) of the composite transistor, an output transistor (4) which collector is the collector (5) of the composite transistor and its emitter is connected to the collector of the input transistor (1), at that in the circuit there is an additional transistor (6) which static mode against the emitter current is set by an additional reference power supply source (7) coupled between the first (8) power supply bus and the emitter of the additional transistor (6), at that the base of the additional transistor (6) is connected to the base of the input transistor (1), its collector is connected to the emitter of the input transistor (1) and the emitter is connected to the base of the output transistor (4). |
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Invention relates to radio engineering and communication and can be used in filtering radio signals, television and radar. The selective amplifier comprises an input voltage source (1), a voltage-to-current converter (2), an output transistor (3), a first power supply bus (4), a first frequency-setting resistor (5), a first (6) and a second (7) balancing capacitor, a second (8) and a third (9) frequency-setting resistor, an auxiliary voltage source (10), a negative power supply bus (11), a common power supply bus (12), an output of the device (13), a first additional current-stabilising two-terminal element (14), an additional transistor (15) an additional capacitor (16). |
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Complementary differential amplifier with expanded active operation range Complementary differential amplifier with an expanded active operation range comprises a first (1) and a second (2) input transistor, inputs (3), (4) of the device, a first (5) and a second (6) output transistor, a reference current source (7), a first (8) and a second (9) current-limiting resistor, first (10) and second (11) series-connected auxiliary resistors, an auxiliary forward-biased p-n junction (12), a common node (13), a first group of antiphase current outputs (14, 15), a second group of antiphase current outputs (16, 17), an emitter p-n junction of an additional transistor (18), a power supply bus (19). |
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Selective amplifier comprises a first (1) input transistor, the base of which is connected to the input (2) of the device, and the collector is connected to the output (3) of the device and is connected through a first (4) frequency-setting resistor to a first (5) power supply bus, a first (6) balancing capacitor connected via alternating current in parallel to the first (4) ) frequency-setting resistor, a second (7) input transistor, the collector of which is connected to a second (8) power supply bus, and the emitter is connected to the emitter of the first (1) input transistor, a second (9) frequency-setting resistor, the first lead of which is connected to the base of the second (7) input transistor, a second (10) balancing capacitor, the first lead of which is connected to the base of the second (7) input transistor. The second lead of the second (10) balancing capacitor is connected to the output (3) of the device, and the second lead of the second (9) frequency-setting resistor is connected to a first (11) auxiliary voltage source. |
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Transimpedance converter of signals of avalanche photodetectors and silicon photomultipliers Transimpedance converter of signals of avalanche photodetectors and silicon photomultipliers comprises a current signal source (1), connected to the current input of the device (2) and the emitter of an input transistor (3), a current-stabilising two-terminal element (4), connected between the emitter of the input transistor (3) and the first (5) power supply bus, a first (6) auxiliary voltage source, connected to the base of the input transistor (3), a second (7) auxiliary voltage source, connected to the base of an output transistor (8), the emitter of which is connected to the collector of the input transistor (3), a collector load two-terminal element (9), connected between the collector of the output transistor (8) and a second (10) power supply bus, a buffer amplifier (11), the input of which is connected to the collector of the output transistor (8), and the output is the output of the device (12). The output of the device (12) is connected to the emitter of the output transistor 8 through a balancing capacitor (13). |
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Instrumentation amplifier with controlled frequency response parameters Instrumentation amplifier with controlled frequency response parameters comprises a signal source, an input differential stage, balancing capacitors, power supply buses, current outputs of the input differential stage, current-stabilising two-terminal elements, a current mirror and an emitter. |
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Broadband voltage repeater comprises an input transistor (1), the control terminal (2) of which is connected to an input signal source (3), the injecting terminal (4) is connected to a first (5) power supply bus through a current-stabilising two-terminal element (6) and is connected to the main output of the device (7), and the charge-collecting terminal (8) is connected to a second (9) power supply bus, wherein the main output of the device (7) is alternating current-shunted by an equivalent load capacitor (10). The circuit includes an additional voltage repeater (11), the input of which is connected to the main output of the device (7), the output is connected to the additional output (12) of the device and through a balancing capacitor (13) to the input of an additional non-inverting current repeater (14), the current output of which is connected to the main output of the device (12). |
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Hybrid differential amplifier comprises a first (1) input transistor, the base of which is connected to the non-inverting input (2) of the device, the collector is connected to a first (3) power supply bus, and the emitter is connected to emitter of a second (4) input transistor, wherein the base of the second (4) input transistor is connected to the inverting input (5) of the device, and the collector is connected to the output (6) of the device and is connected to a second (7) power supply bus through a load circuit (8). The first (1) input transistor used is a first (1) junction field-effect transistor, the gate of which corresponds to the base, the source to the emitter and the drain to the collector of a bipolar transistor, and the load circuit (8) comprises a second (9) junction field-effect transistor, the gate of which is connected to the second (7) power supply bus, the drain is connected to the collector of the second (4) input transistor, and the source is connected to second (7) power supply bus through an additional p-n junction (10), identical to the emitter-base junction of the second (4) input transistor. |
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Controlled amplifier and analogue signal mixer based on darlington differential stage Invention can be used in radio receivers, phase detectors and modulators, as well as in frequency multiplier systems or as an amplifier whose voltage transfer ratio from inputs of channel X depends on the control signal strength in channel Y. The method is carried out using a controlled amplifier and an analogue signal mixer based on a Darlington differential stage which comprises first (1) and second (2) anti-phase input voltage sources, bases of a first (3) and a second (4) input transistor, the emitter of the first (3) input transistor, a first (5) current-stabilising two-terminal element, a first (6) power supply, the emitter a second (4) input transistor, a second (7) current-stabilising two-terminal element, a first (6) power supply, a third (8) input transistor, the emitter of a fourth (9) input transistor, a third (10) current-stabilising two-terminal element, a differential load circuit (11), a second (12) power supply, first (13) and second (14) outputs of the device. |
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Controlled selective amplifier Controlled selective amplifier comprises an input signal source, two input transistors, two current-stabilising two-terminal elements, a power supply, a current mirror, two balancing capacitors, a resistor and a buffer amplifier. The input transistors used are field-effect transistors, whose sources correspond to the emitter, the drain to the collector and the gate to the base of a bipolar transistor. |
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Instrumentation amplifier comprises: an input precision converter of (1) of a first (2) and a second (3) input voltage source connected to a common power supply bus (4), a first (9), a second (10) and a third (11) feedback resistor, an active adder (12) with an inverting (13) and a non-inverting (14) input. |
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Invention relates to radio engineering and communication and can be used in devices for microwave filtering of radio signals in cellular communication systems, satellite television and radar. The selective microwave amplifier comprises an output transistor (1), the base of which is connected to an auxiliary voltage source (2), and the collector is connected through a first (3) resistor to a first (4) power supply bus, a voltage-to-current converter (5), matched with a second (6) power supply bus, the output (7) of which is connected to the emitter of output transistor (1), an input voltage source (8), connected to the input of the voltage-to-current converter (5), a first (9) and a second (10) balancing capacitor. The collector of the first (1) output transistor is connected via alternating current to the first (4) power supply bus through the series-connected first (9) and second (10) balancing capacitors, the common node of which is connected to the output of the device (11) and the output (7) of the voltage-to-current converter (5). |
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Differential operational amplifier with passive parallel channel Differential operational amplifier with a passive parallel channel comprises two input transistors, two output transistors which are junction gate field-effect transistors, a non-inverting stage and a controlled current source. |
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Selective amplifier with extended frequency band Device includes a main operational amplifier, between the output and the inverting input of which a first frequency-dependent resistor is connected, first and second frequency-setting capacitors connected in series between the output of the main operational amplifier and its inverting input, a second frequency-setting resistor, the first lead of which is connected to the common node of the series-connected frequency-setting capacitors, an input voltage source, first and second power supply buses; the second frequency-setting resistor is connected between the common node of the first and second frequency-setting capacitors and the first power supply bus; the input voltage source is connected to the inverting input of an additional voltage-to-current converter, the non-inverting input of which is connected to the inverting input of the main operational amplifier; the common emitter circuit of the additional voltage-to-current converter is connected to the second power supply bus, and the current output of the additional voltage-to-current converter is connected to the common node of the frequency-setting capacitors. |
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Resonance power amplifier contains an input transformer, n amplifying cascades from n step-down power transformers interconnected by means of n in-series resonance circuits where n=2, 3, …, m, and a feedback device providing unidirectional motion of electric energy from the secondary winding of the last power transformer to the primary winding of the input transformer. |
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Low current consumption selective amplifier for sige technological processes Invention relates to radio engineering. The device has first and second input transistors, emitters of which are connected through a first current-stabilising two-terminal element to a first power supply bus, an input voltage source connected to the base of the second input transistor, first and second frequency-setting resistors, a first balancing capacitor, wherein the collector of the first input transistor is connected to a second power supply bus. The collector of the second input transistor is connected to the second power supply bus through the first frequency-setting resistor and is connected through alternating current to the second power supply bus through series-connected first and second additional balancing capacitors, the common node of which is connected to the output of the device and the base of the first input transistor, wherein the base of the first input transistor is connected through alternating current to the common power supply bus through the second frequency-setting resistor. |
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High-speed differential link driver Method is realised by a high-speed differential link driver, having first and second input anti-phase voltage sources connected to corresponding inputs of first and second output stages, first and second load capacitors connected to corresponding outputs of the first and second output stages, the output of the first output stage, the input of a first non-inverting voltage repeater, the current output of a first non-inverting current repeater, a first additional capacitor and a second additional capacitor. |
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Broadband amplifier based on common base (or common emitter) stage Broadband amplifier based on a common base (or common emitter) stage comprises an input stage (1), the control input (2) of which is connected to a signal source (3), a collector load (4) two-terminal element, connected between the power supply (5) bus and the collector output (6) of the input stage (1), a parasitic capacitor (7), connected between the collector output (6) of the input stage (1) and the power supply common bus (8). The circuit includes a non-inverting buffer amplifier (9), the input of which is connected to the collector output (6) of the input stage (1), and the output (10) is the output of the device, and an additional transistor (11), the base of which is connected to an auxiliary voltage source (12), the collector is connected to the input of the non-inverting buffer amplifier (9), the emitter is connected through a current-stabilising two-terminal element (13) to the power supply common bus (8), wherein the output of the device (8) is connected to the emitter of the additional transistor (11) through an additional capacitor (14). |
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Transresistive amplifier for signals of avalanche photodiodes Transresistive amplifier for signals of avalanche photodiodes contains an input cascade (1) with the first (2) and second (3) low-resistance current inputs and the first (4) and second (5) current outputs related to emitters of the first (6) and second (7) matching transistors which bases are united and collectors are connected to the bases of the respective first (11) and second (12) output transistors which emitters are connected to outputs of the device (13) and (14). The first (18) and second (19) additional transistors are introduced into the scheme; their bases are connected to the auxiliary power supply source (20), emitter of the first (18) additional transistor is connected to the emitter of the first (6) matching transistor, emitter of the second (19) additional transistor is connected to the emitter of the second (7) matching resistor and united bases of the first (6) and second (7) matching resistor are connected to the first (13) output of the device through the first (21) additional resistor and to the second (14) output of the device through the second (22) additional resistor. |
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High-efficiency high-power analogue signal precision amplifier High-efficiency high-power analogue signal precision amplifier relates to radio equipment for use as a precision low-frequency amplifier designed based on semiconductor devices. The analogue signal precision amplifier comprises a buffer amplifier, a class D high-efficiency power amplifier, a low nonlinear distortion coefficient linear amplifier, a common feedback amplifier, a low-pass filter, wherein the input analogue signal is simultaneously transmitted to the low nonlinear distortion coefficient precision linear amplifier and the class D high-efficiency power amplifier, output signals are summed in an adder and both channels are included in the common feedback. |
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Group of inventions provides a method and an apparatus for transmitting test signals to a multiport amplifier (MPA), and a method, an apparatus and a system for determining parameter settings for a MPA. Test signals are transmitted to the MPA to provide an output signal indicating a parameter setting for the MPA, wherein the method involves providing a test signal directly to a point in the assembly of a multiport amplifier between the output of the input circuit and the input of the amplifier module. The method of determining parameter settings for an assembly of a multiport amplifier involves receiving first and second output signals associated with the output of the assembly of the multiport amplifier, wherein the first output signal corresponds to a first path of the signal through the assembly of the multiport amplifier, and the second output signal corresponds to a second path of the signal through the assembly of the multiport amplifier, and determining parameter settings based on the first and second output signals. |
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Multi-differential operational amplifier Invention relates to radio engineering and communication and can be used as a broadband signal amplifier, in analogue interfaces, analogue-to-digital converters, RC filters, instrumentation amplifiers etc. The multi-differential operational amplifier includes an input differential voltage-to-current converter, anti-phase current outputs, two-terminal loads, power supply buses, current outputs of the device, input transistors, an input transistor emitter, power sources, reference current sources, scaling resistors, the reference current sources are in form of controlled reference current sources with corresponding control inputs which are connected to the output of the stage for selecting the output in-phase voltage of the input differential voltage-to-current converter, wherein inputs of the stage for selecting the output in-phase voltage of the input differential voltage-to-current converter are connected to corresponding anti-phase current outputs of the input differential voltage-to-current converter. |
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Invention relates to radio engineering and communication and can be used as an analogue signal amplifier in analogue microcircuit structures of various purposes (e.g. broadband and selective HF and UHF amplifiers) The broadband cascade amplifier includes an input transistor (1) whose source is connected to a first (2) power supply bus, the gate is connected to an input voltage source (3) and the drain is connected to a first (4) output transistor and the inverting input of an auxiliary voltage amplifier (5), the output of which is connected to the gate of the first (4) output transistor, and the non-inverting input is connected to a reference voltage source (6), a load circuit (7), connected between the output of the device (8) and a second power supply bus (9). The drain of the first (4) output transistor is connected to the source of an additional transistor (10), the drain of which is connected to the output of the device (8) and the gate is connected to the input of an additional non-inverting current amplifier (11), the output of which is connected to the source of the first (4) output transistor or the source of the additional transistor (10), wherein an additional current-stabilising two-terminal element (12) is connected between the second (9) power supply bus and the input of the additional non-inverting current amplifier (11). |
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Differential operational amplifier with paraphase output Amplifier includes third and fourth input transistors, emitters of which are connected to emitters of first and second input transistors, wherein the base of the third input transistor is connected to the base of the first input transistor, the base of the fourth input transistor is connected to the base of the second input transistor, collectors of the third and fourth input transistors are connected to the bus of a second power supply, emitters of the first and second input transistors are connected to emitters of the first and second additional transistors, the collector of the first additional transistor is connected to the collector of the first input transistor, the collector of the second additional transistor is connected to the collector of the second input transistor, wherein the first auxiliary output of the device is connected to bases of the first and second additional transistors through a first feedback resistor, and the second auxiliary output of the device is connected to bases of the first and second additional transistors through a second feedback resistor. |
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High-frequency balanced amplifier High-frequency balanced amplifier includes first and second parallel amplification channels and an adder unit connected thereto, the output of which is designed for connecting an asymmetrical load. Each amplification channel is in form of two series-connected transistors, wherein the first transistors of the first and second amplification channels are noise-matched, and the second transistors are configured to further amplify signals. A balancing capacitor is connected between emitters of the second transistors, said capacitor being configured to provide a given phase balance of signals in the parallel amplification channels. The adder unit is a matching inphase transformer configured to match symmetrical outputs of the high-frequency balanced amplifier with an asymmetrical load. |
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Complementary input stage of high-speed operational amplifier Complementary input state of a high-speed operational amplifier comprises: first (1) and second (2) input transistors, first (3) and second (4) output transistors with combined bases, first (5) and second (6) device inputs, first (7) and second (8) auxiliary transistors, first (9) current-stabilising two-terminal element, first (10), (11) current outputs of the device, second (12), (13) current outputs of the device, first (14) power supply bus, second (15) power supply bus, second (16) current-stabilising two-terminal element, first (17) additional resistor, second (18) additional resistor, third (19) and fourth (20) additional resistors. |
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Two-step amplifier comprises complementary NPN and PNP transistors whose emitters are combined and form the output of the amplifier, a bipolar power supply, a transformer, one end of the primary coil of which forms the signal input of the amplifier and the other end and the midpoint of the power supply are connected to the common bus of the amplifier; complementary N and P field-effect transistors; the source of the N field-effect transistor is connected to the base of the NPN transistor; the source of the P field-effect transistor is connected to the base of the PNP transistor; the drain of the N field-effect transistor and the collector of the NPN transistor are connected to the positive voltage output of the bipolar power supply, and the drain of the P field-effect transistor and the collector of the PNP transistor are connected to the negative voltage output of the bipolar power supply; transistors of the output stage of the amplifiers are mounted on a common heatsink. |
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Device of signal processing and method of signal processing Device for signal processing for processing of an input signal comprises an amplifier, a step-down converter with the possibility to multiply the version of the processed signal by the version of the amplified signal, an adaptive pre-distorter made with an additional capability to adapt the characteristic of the preliminary distortion on the basis of the first signal with step-down frequency and the second signal with the step-down frequency. |
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Input stage of high-speed operational amplifier Input stage of the operational amplifier comprises first (1) and second (2) input transistors, first (3) and second (4) output transistors, first (5) and second (6) auxiliary transistors, first (7) and second (8) device inputs, first (9) and second (10) forward-biased p-n junctions, a first (11) current-stabilising two-terminal device, current outputs of the device (12), (13), (14), (15), first (16) power supply bus, where between the second (10) p-n junction, connected to the emitter of the second (6) transistor, and a second (17) power supply bus, there is a first (11) two-terminal device connected, between the first (9) p-n junction, connected to the emitter of the first (5) transistor, and the second (17) power supply bus, there is a second (18) two-terminal device connected, between the common node (19) of the first (9) p-n junction and the second (18) two-terminal device, as well as the common node (20) of the second (12) p-n junction and the first (11) two-terminal device, there are series-connected third (21) and fourth (22) resistors, the common node (23) of which is connected to the bases of the first (3) and second (4) input transistors. |
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Selective amplifier has an input signal source, a voltage-to-current converter, an input transistor, an auxiliary voltage source, first and second frequency-setting resistors, first and second balancing capacitors, an additional current mirror and two current-stabilising two-terminal elements. The input signal source is connected to the input of the voltage-to-current converter. The base of the input transistor is connected to the auxiliary voltage source. The output of the voltage-to-current converter is connected to the collector of the input transistor and through the first frequency-setting resistor to the first power supply bus, and is also connected to the input of the additional current mirror. The common emitter output of the additional current mirror is connected to the second power supply bus through the first additional current-stabilising two-terminal element. |
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Selective amplifier has an input voltage source, an additional power supply, a voltage-to-current converter, output and additional transistors, two frequency setting resistors, two current-stabilising two-terminal elements, two balancing capacitors. The output transistor has a collector which is connected through a first frequency setting resistor to a first power supply bus. The output of the voltage-to-current converter is connected to the collector of the output transistor and through series-connected first and second balancing capacitors through alternating current to the common power supply bus. The common node of the first and second balancing capacitors is connected through the second frequency setting resistor to the output of the device and is connected to the emitter of the output transistor. The emitter of the output transistor is connected through the first current-stabilising two-terminal element to the second power supply bus. The base of the output transistor is connected to the emitter of the additional transistor and through the second current-stabilising two-terminal element to the first power supply bus. |
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Invention relates to radio engineering and can be used as a receiving amplifier of active phased antenna arrays with a built-in test and calibration system, where high sensitivity is required. The balanced microwave amplifier comprises two amplifiers having identical parameters, connected between cascade-connected input and output 3 dB directional couplers; the ballast circuit of the input 3 dB directional coupler comprises a unit for inputting a calibration signal, and each output arm of the output 3 dB directional coupler can be connected through a controlled switch to either the output of the balanced microwave amplifier or to a matched ballast load, wherein the amplifiers with identical parameters have reflection-type power limiters at their inputs. |
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Input stage of high-speed operational amplifier Input stage of a high-speed operational amplifier has first (1) and second (2) input transistors whose emitters are connected through corresponding first (3) and second (4) auxiliary resistors to emitters of the first (5) and second (6) output transistors with combined bases, first (7) and second (8) inputs of the device, connected to corresponding bases of the first (1) and second (2) input transistors, third (9) and fourth (10) auxiliary resistors, first (11) and second (12) auxiliary forward-biased p-n junctions, a first (13) current-stabilising two-terminal element, current outputs of the device (14), (15), (16), (17), connected to collectors of input (1), (2) and output (5), (6) transistors. |
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Bidirectional microwave amplifier Bidirectionality of the amplifier is achieved by using circulators or directional couplers in place of switches at inputs of the device. |
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Selective amplifier with paraphase output In the selective amplifier, the emitter-base junctions of the first (3) and second (5) output transistors are connected in parallel to corresponding additional first (17) and second (18) forward-biased p-n junctions, wherein the first (7) output of the device is connected to the base of the second (4) input transistor through a second (13) capacitor, the base of the second (4) input transistor is connected to the common bus of power sources (19) through a first (20) additional resistor, and the base of the first (3) output transistor is connected to the base of the second (5) output transistor. |
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Method for power amplification on gan microwave transistors and pulsed microwave power amplifier Pulsed microwave power amplifier on GaN microwave transistors includes input and output summation microstrip bridges, in the branches of which there are GaN microwave transistors whose gates are connected to a voltage stabiliser and the drains are connected to a high-speed pulse modulator, having a power commutator switch on a GaN power transistor with a high-speed driver which connects the drain of the GaN microwave transistors to a storage capacitor, a power discharge switch on a power GaN transistor with a high-speed driver, which facilitates discharge of the capacitances of the GaN microwave transistors after disconnecting the commutator switch and the pulse-width modulation power supply, a discharge switch on a power GaN transistor with a high-speed driver, which enables to disconnect the storage capacitor and the drain of the GaN microwave transistor from the pulse-width modulation power supply with output voltage of 5-45 V and connect the storage capacitor to the pulse-width modulation power supply when disconnecting the supply voltage from the drains of the GaN microwave transistors using the commutator switch. |
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Source of supply to moderating system for microwave amplifier on running-wave tubes Source of supply to a moderating system of a running-wave tube comprises serially connected main 1 and additional 2 rectifiers. The positive pole of the additional rectifier via serially connected controller 3 and current-measuring resistor 4 is connected to the body, and the negative pole of the main rectifier is connected to the cathode of the running-wave tube and the inlet of the feedback divider 6, the outlet of which is connected with the inlet of the comparing device 7, the second inlet of which is connected to the source of reference voltage 8, and the outlet via the amplifier of the differential signal 9 - with the inlet of the controller 3, inlets of rectifiers 1 and 2 are connected via a transformer of galvanic isolation 11 with an outlet of a converter of DC voltage into AC voltage 10. An anode of a high-voltage diode 5 is connected between the main 1 and additional 2 rectifiers, and the cathode - between the controller 3 and the current-measuring resistor 4. The second feedback divider 12, the inlet of which is connected between the controller and the additional rectifier, the second comparing device 13, inlets of which are connected with the outlets of the second feedback divider 12 and the second source of reference voltage 14, a power amplifier 15, the inlet of which is connected with the outlet of the second comparing device 13 via the second amplifier of the differential signal 16, and the outlet supplies the converter of DC voltage into the AC voltage 10. |
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Method for reducing errors of a direct current amplifier with a modulator at the input and a demodulator at the output consists in the fact that temperature of the amplifier is measured and a correction signal is shaped, which is added to an output signal of the amplifier; with that, voltage of the correction signal is formed pro rate to the speed of the change of amplifier temperature. |
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Ultra-broadband signal amplification device Ultra-broadband signal amplification device, having a first mixer and a second mixer, two heterodynes and a band-pass filter in form of a differential or summation frequency filter, is also provided with a high-frequency amplifier situated between the band-pass filter and the second mixer, a low-pass filter connected to the output of the second mixer, as well as a reference generator, the outputs of which are connected to heterodyne inputs. |
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Buffer amplifier consists of operational amplifier and two connecting wires connected to its input and inverting input and thus forming by their connection an output of the buffer amplifier at the other end, while input of the buffer amplifier is non-inverting input of the operational amplifier connected to voltage source; a resistor and one or two antiphased diodes, preferably germanium ones, are introduced in parallel to inputs of the operational amplifier. |
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Electronic device with data rate dependent power amplifier bias Wireless circuitry in an electronic device contains output power amplifier circuitry for amplifying transmitted radio-frequency signals. The power amplifier circuitry is powered using a bias voltage. The magnitude of the bias voltage is selectively reduced to save power. Control circuitry maintains a table of bias voltage settings to use under various conditions. These conditions include required output power values as determined by link quality, transmission mode status, and required data rates. When link quality is low or when high data rates are required, the bias voltage can be maintained at a relatively high level to ensure that the power amplifier operates linearly and does not exhibit excessive noise. |
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Low-noise band-pass balanced microwave amplifier In the disclosed low-noise band-pass balanced microwave amplifier, having two single-stage transistor amplifiers connected between input and output cascade-connected three-decibel directional couplers, the outputs of the transistor amplifiers are connected to inputs of the output three-decibel directional coupler through transmission lines, connected in series with band-pass filters, which reflect energy beyond the pass band, wherein the phase incursion ϕ of each transmission line at a frequency lying in the region of the rise of the amplitude-frequency characteristic of input matching circuits of the transistor amplifiers is ϕ = [ a r c t g ( − j X f j Z ) + a r c t g ( − j X T j Z ) ] . |
Another patent 2513683.