Output current stage with automatic active-passive switching

FIELD: electricity.

SUBSTANCE: invention relates to an output current stage. The invention proposes output current stage (100) having input (IN), output (OUT) for connection to the input of device (200), to which current shall be fed, control stage (T1, T2, Z1) that establishes output current (Iout) and energy supply stage (Uv; Uv, -Uv) that is capable of provision of output current (Iout) energy. Output current stage (100) has the first transistor (T1) that controls output current in a closed cycle in a passive operating mode and the second transistor (T2; T2, T3) that controls output current (Iout) in a closed cycle in an active operating mode; with that, the first transistor (T1) and the second transistor (T2; T2, T3) are controlled by control stage (OP1) in an open cycle, and when in the active operating mode, the energy supply stage (Uv; Uv, -Uv) is controlled in an open cycle so that it can provide energy of output current (Iout).

EFFECT: creation of an output current stage with automatic active-passive switching.

6 cl, 5 dwg

 

The invention relates to a current output stage with automatic active-passive switching.

The prior art knows many of the output current of the cascades. They are usually active output current of the cascades or passive output current of the cascades.

Active output current cascade regulates the output current and provides the energy of the output current. This active output current cascade is applicable for the control of a passive receiver, as shown in Fig.1A.

Passive current output cascade regulates output current, and the energy of the output current is provided from the outside of the active receiver. This passive current output cascade is applicable to control the active receiver, as shown in Fig.1B.

Accordingly, in the case of the output current of the cascades, it is always necessary first to know whether the entrance, which should be supplied with current, active or passive input.

However, there is often a misuse, because in many cases not immediately clear whether the entrance, which should be supplied with current, active or passive input.

In addition, the development and stockpiling of different output current cascades industrial purpose associated with high costs.

Although in more modern output current of the cascades United �VA option in such cascades is still used physical separation into two different outputs, and users must choose the appropriate outputs for use. Such output current cascades are used, for example, in the device selection signals HASI MCR-EX-SL-RPSSI-I-SP, manufactured by the applicant. A device of this type is also known from DE 102006024311.

However, in these cases also has a misapplied because often it is not clear whether the entrance, which should be supplied with current, active or passive input.

An additional disadvantage of such solutions is the need to use a larger number of terminals, thus increasing the size of the body, whereas the General trend is a decrease in the size of the body.

In light of this, the basis of the invention is to create an output current of the cascade, in which due to the inventive design overcome one or more disadvantages of the prior art.

The solution to this problem is provided by the output current of the cascade, which has an input and output for connection to the input device, which must be made current. Output current cascade additionally has a control stage, which sets the output current, and the degree of power that is able to provide ene�Gia output current. Output current cascade further has a first transistor that regulates the output current in the passive mode, and the second transistor, which regulates the output current in an active mode, wherein the first transistor and the second transistor are controlled by a regulatory level, and in the active mode of operation step flow of energy is controlled to provide an energy output current.

The solution of the problem is also ensured by the output current of the cascade, which has an input and output for connection to the input device, which must be made current. Output current cascade has additionally, control stage, which sets the output current, and the degree of power that can provide energy to the output current. Output current cascade has a detector that detects the output if the output current cascade in passive or active mode, and upon detecting an active mode of operation controls the level of power supply so that it provides energy to the output current, and upon detection of the passive energy of the output current is supplied from the input device, which is submitted must be current.

In one embodiment, the implementation of the output current of the cascade regulating step is the transformer voltage�deposits in current or current transformer in the current.

In one of the embodiments of the invention output current cascade is designed for bipolar operation.

In yet another variant implementation of the control stage contains an operational amplifier.

In one additional embodiment of the detector includes one or more transistors.

In yet another variant implementation of the invention, the detector comprises at least one MOS field-effect transistor.

The invention will be described in more detail with reference to the drawings. The drawings show:

Fig.1A is a passive receiver,

Fig.1B - active receiver,

Fig.2 - option wire connections of the output current of the cascade according to the invention with automatic active-passive switch,

Fig.3 - an additional version of the wire connections of the output current of the cascade according to the invention with automatic active-passive switching, and

Fig.4 is another version of the wire connections of the output current of the cascade according to the invention with automatic active-passive switching.

Fig.2 illustrates one implementation of the output current of the cascade 100 according to the invention. The output stage has an input IN and output OUT is for connection to the input device 200, which is submitted must be current.

This device 00, which should be current, can be passive, as shown in Fig.1A, or active, as shown in Fig.1B.

Output current cascade 100 additionally has a control stage OP1, which sets the output current, and the degree of Uv power that can provide energy to the output current lout.

Output current cascade 100 further has a first transistor T1, which regulates the output current lout in the passive mode, and the second transistor T2, which regulates the output current lout in the active mode, the first transistor T1 and second transistor T2 is controlled by regulating the degree of OP1, and in the active mode of operation the level of Uv energy supply is controlled to provide an energy of the output current lout.

A current output stage contains detectors T1, T2, Z1, which determine the output OUT whether a current output cascade in passive or active mode, and upon detecting an active mode of operation controls the level of Uv energy so that it provides energy to the output current lout, and upon detection of the passive energy of the output current lout flows from the input device 200, which is submitted must be current.

For clarity, hereinafter will be described in more detail operation.

When the active device 200, schematics�and illustrated in Fig.1B, must be connected to the output OUT, the output current lout, excited by a source of external voltage Uext, flows through the output load Rb device 200. From there, the current flows through T1, R1 and D1, and thus again reaches the device 200. In this case, the output current lout is set by the detector T1.

In a variant implementation, illustrated in Fig.2, OP1 included in the voltage transformer in the current and, accordingly, control stage, which sets the current through T1 is proportional to the voltage Uin at the input IN.

Since T2 is connected through the Z-diode Z1, in this mode of operation, the transistor T2 is blocked, i.e. from the source of Uv energy is not current. Accordingly, the output current lout flows through a managed T1.

If the output OUT should be connected to a passive device, as schematically illustrated in Fig.1A, the operational amplifier OP1 will first try to set the output current using a transistor T1.

However, because the receiver has no current source, the subsequent opening of the transistor T1 will not provide current lout, as he also blocked T2.

To counteract this transistor is additionally driven, and the output voltage U increases in operational amplifier.

If the output voltage U of the operational amplifier OP1 included in the voltage transformer in the current and accordingly, the control stage, overcomes the breakdown voltage, etc. Z-diode Z1, is illustrated as an example, the current control may proceed from step Uv power CT.

Then the output current lout, excited by the level of Uv energy that flows through T2 and then through output load Rb transit through the fully connected (open) the transistor T1 and R1 through back to the level of Uv energy supply.

Needless to say that the transistors T1 and T2, shown in the drawings, may be applied to the transistors of various types, and, accordingly, their choice is not limited to bipolar transistors, field transistors or Darlington transistors.

In addition, it goes without saying that T1 and T2 can be transistors of various types, i.e., T1 may be a field effect transistor, and T2 is a bipolar transistor.

An implementation option, illustrated in Fig.3, differs from the embodiment illustrated in Fig.2 mainly in that instead of a voltage transformer, the current in the quality control stage uses a transformer the current in the current, as can be seen from different wire connections of the operational amplifier OP1.

In addition, in a variant implementation, illustrated in Fig.4, is provided a bipolar �Abbott.

In this case, T2 and T3 form a bipolar output stage, which sets the current similarly to T2 in Fig.2 and 3 in the active mode, i.e., for passive devices 200.

In turn, T1 sets the current in the passive mode, i.e. the active device 200.

T4 is a switch that includes D1 while working in passive mode.

In this regard, for the transistors is chosen such sensitivity thresholds, so that the transistor T3 to set the output current lout when the negative output voltage U of the operational amplifier OP1. In this case, illustrated by the output current lout is negative.

In this mode, T1, T2 and T4 act as blocks.

In contrast, if T1 sets the output current lout in the passive mode, T4 is conductive, and T2 and T3 act as blocks.

If T2 adjusts the output current lout in the active mode, T1 and T4 are conductive, T3 acts as a unit.

In this case, the thresholds of sensitivity are realized in the form of a Z-diode in the relevant findings database or host.

When a negative output current lout in active mode, the diode D1 should be turned off T4, since otherwise D1 will short-circuit negative output current lout.

In addition, in the circuit illustrated in Fig.4, the transistor T1 is a field �OP transistor. Its advantage is that due to its technical solutions, the transistor passes a negative output current lout, because it is inherently equipped with a diode structure. This part of the design of the diode current flows, even if T1 is blocked in the main direction.

And in this case, it goes without saying that instead of the voltage transformer in current can be used a current transformer in the current, as shown in Fig.3.

A list of items

T1, T2, T3, T4Transistor
D1Diode
Z1Z-diode
OP1Operational amplifier
INInput
OUTOutlet
loutOutput current
UinInput voltage
linInput current
+Uv, -UvVoltage
100Output current to�Scud
200Powered devices

1. A current output stage (100) having an input (IN), output (OUT) for connecting to the input device (200), which should be submitted with a current control stage (T1, T2, Z1), which sets the output current (Iout), and the step of applying energy (Uv; Uv, Uv), which is able to provide energy to the output current (Iout),
characterized in that a current output stage (100) further comprises a detector (T1, T2, Z1), which determines the output, if output current cascade (Iout) in passive or active mode, and upon detecting an active mode of operation controls the stage (Uv; Uv, Uv) energy supply so that it provides energy to the output current (Iout), upon detection of a passive energy of the output current (Iout) flows from the input device (200), which is submitted must be current.

2. Output current cascade according to claim 1, wherein the regulating step is the transformer voltage to current or current transformer in the current.

3. Output current cascade according to claim 1, characterized in that the output current of the cascade is designed for bipolar operation.

4. Output current cascade according to claim 1, characterized in that the control stage contains an operational amplifier (OP1).

5. Output current cascade according to claim 1, wherein codetection contains one or more transistors (T1, T2; T1, T2, T3, T4).

6. Output current cascade according to any one of preceding paragraphs 1 to 5, characterized in that the detector comprises at least one MOS field-effect transistor (T4).



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to the field of electrical equipment and can be used in digital control systems of DC voltage converters with the function of suppression of the hazardous oscillations of output voltage occurring at a certain set of parameters of the system. In the nonlinear dynamics control system the control system consisting of the main subsystem and the control auxiliary subsystem, approximators on the basis of neural networks is connected to the power part of the converter. The converter control signal provides the stabilization of average value of output voltage. In the system the correction of error signal is provided, thus the stabilization of the design dynamic mode (1 cycle) is provided.

EFFECT: ensuring of pre-set nonlinear dynamic properties of the system and pre-set parameters of speed and accuracy of output voltage stabilization in case of refusal from parametrical synthesis.

3 dwg

FIELD: electricity.

SUBSTANCE: device comprises auxiliary power supply source connected to automobile 12 V accumulator battery, half-bridge transistor converter, current-limiting resistor, current sensor, transformer-rectifying cascade, input filter, output filter, the first and second power amplifiers for transistor control of half-bridge transistor converter, voltage regulator, comparator, RS-trigger and toggle flip-flop, the first and second relays, voltage sensor at positive input terminal of half-bridge transistor converter, the first and second 4OR-NOT logic elements; the device also comprises square-wave generator and power supply source includes step-down PWM-regulator formed by in-series valve and field transistor, and the third power amplifier connected to gate of the field transistor, at that the second output of voltage regulator through indicator is connected to positive terminal of automobile 12 V accumulator battery.

EFFECT: improved power characteristics and expanded functionality of the device.

1 dwg

FIELD: electricity.

SUBSTANCE: electronic stabiliser comprises a ballast resistor connected in series to the load and a regulating element based on two series-connected transistors, feedback divider and voltage rectifying divider, all of them connected in parallel to the load, at that one arm of the feedback divider is made as in series stabilitrons and resistor, the centre tap of the feedback divider is connected to input of the first transistor while the centre tap of the rectifying divider is connected to input of the second transistor.

EFFECT: higher reliability of the stabiliser.

1 dwg

FIELD: electricity.

SUBSTANCE: device contains five transistors, three resistors and a current source which is coupled between the power supply bus and output terminal; the first resistor is coupled by its first output to the common bus, the second and third resistors are connected by their first outputs to the output terminal; bases of the first and the second transistors are connected to collectors of the first and fifth transistors and bases of the fourth and fifth transistors; the second output of the first resistor is coupled to emitter of the second transistor; emitters of the first and third transistors are connected to the common bus; collector of the third transistor is connected to the output terminal; the base of the third transistor is connected to collectors of the second and fourth transistor; emitter of the fourth transistor is connected to the second output of the second resistor; emitter of the fifth transistor is connected to the second output of the first resistor.

EFFECT: receipt of thermally stable output voltage, which value is close to doubled energy gap width of the used semiconductor.

3 dwg

FIELD: electricity.

SUBSTANCE: in bridge self-maintained voltage transducer the secondary winding of a transformer is used to design a transistor saturation source. The result is obtained due to the bridge self-maintained voltage transducer with transistor saturation source which comprises the first, second, third and fourth transistors and their collectors, emitters of the first and second transistors, resistors, a transformer, a filter capacitor and the power source bus.

EFFECT: reducing power loses at transistors of the bridge self-maintained voltage transducer and increasing its reliability.

1 dwg

FIELD: electricity.

SUBSTANCE: voltage stabiliser includes first and second transistors connected by emitters to a common bus, first and second resistors connected by first outputs to the common bus, third transistor connected by emitter to second output of the first resistor, third resistor connected by first output to connection point of first transistor base and third transistor collector, fourth transistor connected by collector to output terminal, fourth resistor connected by first output connection point of second output of third resistor and fourth transistor emitter, second transistor collector and base connected to second output of fourth resistor, fifth resistor connected by first output to output terminal and by second output to connection point of fourth transistor base and second output of second resistor, fifth and sixth transistors connected by emitters to power bus and by bases to sixth transistor collector, seventh transistor connected by collector to power bus, eighth transistor connected by emitter to output terminal, current source inserted between power bus and connection point of eighth transistor base and first and fifth transistor collectors, sixth resistor inserted between second and third transistor bases, eighth transistor collector connected to sixth transistor collector, seventh transistor base connected to eighth transistor base, seventh transistor emitter connected to output terminal.

EFFECT: output voltage of stable temperature, reduced minimum difference of stabiliser input/output voltage.

4 dwg

FIELD: electricity.

SUBSTANCE: device includes first and second resistors connected with their first outputs to power bus, third resistor connected with one its output to the common bus, first transistor connected with its source to second output of the first resistor, second transistor connected with its emitter to the common bus, third transistor connected with its collector to gate connection of the first transistor with second output of the second resistor, fourth and fifth resistors with their first output connected to collector of the second transistor, second output of the fifth resistor connected to bases of the first and third transistors, emitter of the third transistor connected to second output of the third resistor, second output of the fourth resistor and drain of the second transistor connected to output circuit.

EFFECT: reduced temperature coefficient of output voltage.

3 dwg

FIELD: electricity.

SUBSTANCE: invention refers to electric engineering and can be applied in spacecrafts for current limitation in electric power supply system of solar battery panel opening for a drive opened to the limits. Redundant DC stabiliser includes control element (CE) connected in series with current sensor and load and based on four n-channel MIS transistors connected in parallel and in series, negative CE output connected via current sensor to common power supply bus and positive output connected via load to positive power supply bus; four identical control circuits (CC) of CE MIS transistors are added; each CC output is connected to gate of separate MIS transistor of CE; negative power supply output of each CC is connected to common power supply bus and positive output is connected to positive power supply bus; gauge input of each CC is connected to the point of CE connection with current sensor; each CC includes input non-inverting amplifier with its input connected to CC gauge input and output connected to inverting input of output amplifier (OA), output of which is connected to CC output; reference voltage source with its output connected to non-inverting input of OA; power supply pulse generator with its output connected to inverting OA input.

EFFECT: improved reliability of DC stabiliser.

1 dwg

FIELD: electricity.

SUBSTANCE: invention is related to a capacitive power supply unit, moreover to an electronic device equipped with the capacitive power supply unit. To this end at the first facility the capacitive power supply unit contains an input part (10) having input contacts (Ln, Nt) to connect an alternating-current source and a capacitive coupling; a rectifying part (20) connected through the capacitive coupling to the input contacts (Ln, Nt) and an output part (30) connected to the rectifying part, there's an auxiliary device (R1) limiting start-up current where output contacts (V+, V-) are connected to the respective contacts of a device (D5) limiting output voltage, and in-series capacitive impedance (Zdc) conducting direct current has a resistive component with a resistive value equal to at least 0.2 of the first circuit resistive value. At the second facility the electronic device contains a power input (101), (102) for connection to the supply mains; a capacitive power supply unit (110) coupled to the power input; the first functional unit (140) receiving power supply from the capacitive power supply unit.

EFFECT: reduction of heat dispersion losses.

6 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: device contains five transistors, two resistors and current source coupled between the power supply bus and output terminal, bases of the first and second transistors are connected to collectors of the first and fifth transistors, the first resistor is coupled between the common bus and emitter of the second transistor, the second transistor is coupled between the output terminal and connected emitters of the fourth and fifth transistors, emitters of the first and third transistors are coupled to the common bus, bases of the third, fourth and fifth transistors are joined with collectors of the first and fourth transistors, a collector of the third transistor is connected to the output terminal.

EFFECT: obtainment of thermally stable output voltage at values closed to double energy gap width.

3 dwg

FIELD: voltage regulation circuits used in manufacture of chip-carrying card integrated circuits.

SUBSTANCE: proposed circuit has series regulator L with field-effect transistor M1. Series-connected between source lead placed at higher potential VDDext and gate lead M1 are capacitor C1 and second field-effect transistor that functions as transmitting gate TG1 controlled by power/reset signal POR. Applying external supply voltage VDDext with series-connected transmitting gate TG1 drives in conduction field-effect transistor M1 in compliance with charge of capacitor C1 that takes place in the process. As this charge takes certain time, overshoot of internal voltage VDDint can be avoided.

EFFECT: reduced degree of overshoot when driving transistor in conduction.

3 cl, 5 dwg

FIELD: electric engineering.

SUBSTANCE: support voltage source has first and second amplifiers 5, 6, two power sources 7, 8 of opposite polarity, first and second resistors 1, 2, connected serially and connected between common point 7, 8 and inverse input 5, connected to output 6, and serially connected third and fourth resistors 3, 4, which are connected to middle point of resistors 1, 2 and to output of amplifier 5, inverse amplifier input 6 is connected to middle point of resistors 3, 4, while non-inverse inputs of amplifier 5, 6 are connected by common point 7, 8. as first and fourth resistors a non-linear element is connected, having volt-ampere characteristics of voltage stabilizer. As resistor 2 or 3 non-linear element is connected, having volt-ampere characteristics of current stabilizer.

EFFECT: simplified construction.

2 cl, 4 dwg

FIELD: power units designed to ensure spark safety of loads.

SUBSTANCE: proposed device 200 designed to supply with power spark-proof load provided with feedback circuit of integrated current supply and current limiting component and also to minimize voltage that should be limited in compliance with sparking safety standards has power supply PS and output terminals T1-T2 for connecting device to spark-proof load. Voltage limiting unit Z1 inserted between power supply PS and output terminals T1-T2 is used to limit voltage across load leads. Current limiting unit 202 has barrier resistors designed for current-to-voltage conversion to provide for comparison by operational amplifier that controls variable impedance Q1 and limits current supply to load.

EFFECT: reduced manufacturing cost, improved sparking safety.

19 cl, 3 dwg

FIELD: electric engineering.

SUBSTANCE: for controlling constant voltage pulse stabilizer current value of stabilized voltage is measured, measured value is compared with constant support voltage, on basis of discordance signal by means of synchronization voltage of saw-like shape broad-pulse modulated signal is formed, used for controlling adjusting stabilizer element. Also, this signal is demodulated and received correction signal is added to discordance signal. When selecting correction signal transfer coefficient, static error value of voltage stabilization is corrected. It is possible to ensure equality of static error to zero by selecting transfer coefficient appropriately. Current control method is effective for different variants of direct voltage converters (of increasing, decreasing and inverting types) and different modes of their operation (as with continuous, as with discontinuous stabilizer throttle currents).

EFFECT: lesser static error of voltage stabilization in case of external interference (change of inlet voltage or load resistance, influence of non-ideal elements of stabilizer power circuit).

3 dwg

FIELD: electric engineering.

SUBSTANCE: device has compound adjusting element 1, force transistor 2, synchronization transistor 3, discordance signal amplifier 4, resistor 5, protective transistor 6. when main power fails, protective transistor opens to lift voltage from collector of transistor 3 and amplifier 4. this provides protection for transistor 3 from overload and increases reliability of stabilizer operation.

EFFECT: higher reliability, higher efficiency.

2 dwg

FIELD: electric engineering.

SUBSTANCE: device has adjusting element 2, input of which is connected to input 1 of voltage transformer, and output - to first output of voltage transformer, block 3 for controlling protection, output of which is connected to control input of adjusting element 2, overload detector 6, connected to common bus and input of which is connected to second output of voltage transformer. Also provided are repeated enabling delay block 4 and overload duration determining block 5.

EFFECT: higher efficiency, broader functional capabilities.

2 dwg

Voltage converter // 2260833

FIELD: electric engineering.

SUBSTANCE: device has broadband pulse modulator, power amplifier, field transistor, service electric power source, special pulse generator, overload protection device, voltage stabilizer, voltage check connection device, also provided is overload protection device with first optic couple and differential amplifier, check connection device is made on two differential amplifiers and second optic couple, LC-filter, four resistive dividers.

EFFECT: higher reliability, lower costs, higher quality.

1 dwg

Converter // 2260894

FIELD: converter and pulse engineering; feeding pulse-power loads.

SUBSTANCE: proposed converter designed to convert dc to pulse energy has power buses 1 with forward diodes 2, 3, regulating transistor 4 with control unit 5 in base circuit, output transformer 6 with two sections 7, 8 of input winding, first and second capacitors 9, 10 connected to starting lead of winding section 7 and to finishing lead of section 8, second leads of capacitors 9 and 10 being connected to emitter and collector of transistor 4, respectively. Novelty is that finishing lead of first section 7 is connected to collector and starting lead of second section 8, to emitter of regulating transistor 4 through cumulative magnetically coupled windings 11, 12 of choke 13, and diodes 2, 3 of power buses are connected to common point of input winding section and choke winding 13 cumulatively with transistor 4. Power buses are shorted out by additional diode 14.

EFFECT: reduced switching losses.

2 cl, 2 dwg

FIELD: electronics and automatic control; power converter engineering.

SUBSTANCE: proposed method for stepless regulation of ac voltage and its phase variation includes conversion of sine-wave voltage by means of inverter into sequence of amplitude- and length-modulated bipolar pulses of much higher frequency followed by their rectification to produce sine-wave voltage of original frequency across output of ripple filter. Its amplitude is proportional to relative pulse length and phase reversal occurs in response to variation in operating phase of synchronous rectifier switches.

EFFECT: reduced size and ability of varying output voltage phase.

1 cl, 2 dwg

FIELD: the invention refers to the sources of electric supply of electron aids whose functioning is carried out on the principles of electronic engineering and/or radio technique.

SUBSTANCE: the aids include at least one active element with three or more electrodes particularly a transistor and using this active element(elements) carry out amplification, conversion or generation (formation) of working electric signals of alternating or direct voltage including broadband signals. The mode and the arrangement for electric supply of predominantly portable electron aids is carried out by way of using at least one a three-electrode active element, amplification, conversion or generation of an electric signal of alternating or direct voltage based on supplying voltage on the clamps of the electron aid, impulse voltage whose on-off time ratio is within the limits of 1,1-20,0 is used as supply voltage. In the second variant of the mode and of the arrangement the impulse voltage has the following parameters: the frequency of impulses is at least one level higher than the maximum frequency of the spectrum of the electric signal of alternating voltage or at least one level less than the minimal frequency of the spectrum of this electric signal, and the duration of the impulse fronts is at least one level less than the magnitude inverse to the maximum frequency of the spectrum of the electric signal of alternative voltage.

EFFECT: decreases electric consumption.

10 cl, 3 dwg

Up!