RussianPatents.com
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Optical amplifier and optical transmission line. RU patent 2248087. |
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FIELD: adjustable optical amplifiers and optical transmission lines. SUBSTANCE: proposed controllable optical amplifier designed to transfer wavelength-multiplexing signals has, respectively, first gain control device (OE1, OE2, R1) and second dominating control device (OE2, R2, R1) having much slower output power control characteristic (Pout)in compliance with basic sold power (Psold). Transmission lines equipped with such amplifiers are characterized in that both fast changes in level and slow changes in attenuation can be compensated for in them. EFFECT: provision for maintaining reception level with changes in quantity of wavelength-multiplexing channels. 8 cl, 3 dwg
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Method of monitoring fiber-optical circuit / 2247347 Method comprises feeding the standard optical signal to the light guide to be tested and measuring reflected signal. The oscillation of the signal power with the amplitude exceeding that of the initial level indicates the presence of a defect. |
Optical amplifier and optical transmission line / 2248087 Proposed controllable optical amplifier designed to transfer wavelength-multiplexing signals has, respectively, first gain control device (OE1, OE2, R1) and second dominating control device (OE2, R2, R1) having much slower output power control characteristic (Pout)in compliance with basic sold power (Psold). Transmission lines equipped with such amplifiers are characterized in that both fast changes in level and slow changes in attenuation can be compensated for in them. |
Device for overcurrent protection of unidirectional pulses amplifier / 2328818 Device consists of feedback circuit, which contains power divider, detector, control unit, resistor, bipolar transistor, at that power divider is made as current transformer that consists of ferrite ring and two windings, the primary winding is made in the form of strip conductor passed through ferrite ring, the ends of which form input and the first output of power divider, and the secondary winding is made of wire wound on ferrite ring, the first end of which is connected to conductor that is common for amplifier and feedback circuit, and the second end forms the second output of power divider, at that resistor is installed in the opening of ferrite ring, and its outputs embrace the ring from both sides and are galvanically connected between each other. |
Bipolar current mirror with regulated transfer constant / 2377633 Bipolar current mirror with regulated transfer constant relates to electrical measurement techniques and automation. For this purpose regulating transistors are used, having a structure which is opposite to that of current mirror transistors and which work as controlled voltage sources for base or emitter circuits of not only output but input current mirror transistors as well. The transfer constant is regulated with differential voltage applied across bases of regulating transistors. |
Differential amplifier with controlled gain / 2384935 Invention relates to radio engineering and communication and can be used as a broadband amplifier whose voltage transfer ratio depends on the control signal level uc, for example in analogue microcircuit structures for various functional purposes, automatic gain control systems, analogue signal multipliers etc. The differential amplifier (DA) has first (1) and second (2) input transistors (T) of a parallel-balance cascade, whose emitters are connected to the current input (3) of the parallel-balance cascade, the bases are connected to the corresponding first (4) and second (5) main inputs of the DA, and the collectors are connected to the first (6) and second (7) outputs of the DA and to the load circuit (8), first (9) and second (10) T of the gain control circuit (GCC), whose bases are connected to the control input (11) of the DA, the emitters are connected to the first (12) reference current source (RCS), and the collectors are connected to the first (6) and second (7) outputs of the DA. The circuit includes an additional resistor (13) and an additional RCS (14), where the additional resistor (13) is connected between the joined emitters of the first (9) and second (10) T of the GCC and the current input (3) of the parallel-balance cascade, which is connected to the additional RCS (14). |
Controlled two-stage differential amplifier with inphase negative feedback / 2384936 Proposed invention relates to radio engineering and communication and can be used in automatic gain devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier is the basic block of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The differential amplifier (DA) has an input parallel-balance cascade (1) with a controlled current source (CCS) (2) in a common emitter circuit (3), first (4) and second (5) current outputs of which are connected to first (6) and second (7) load two-terminal circuits and corresponding first (8) and second (9) inputs of the output differential stage (DS) (10), where the output (11) for the inphase signal of the DS (10) is connected to the control input (12) of the CCS (2) in the common emitter circuit (3). The circuit includes a control voltage-top-current converter (13) having first (14) and second (15) inphase outputs connected to corresponding first (4) and second (5) current outputs of the input parallel-balance cascade (1). |
Complementary differential amplifier with controlled gain / 2384937 Invention relates to radio engineering and communication and can be used in automatic gain devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier and analogue multiplier are basic blocks of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The complementary differential amplifier (CDA) has a first differential stage (DS) with n-p-n transistors (1, 2), first current input (3), first (4) reference current source (RCS) and first (5) and second (6) current outputs of the first DS, a second DS on p-n-p transistors (T) (7, 8) with a second current input (9), second RCS (10), first (11) and second (12) current outputs of the second DS, first (13) and second (14) inputs of the CDA connected to corresponding bases of T (1, 7) and bases of T (2, 8), an output current adder (15) with first (16) and second (17) inputs matched with the bus of a positive power supply (PS) (18), as well as with first (19) and second (20) inputs matched with the bus of a negative PS (21). The system includes first (22) n-p-n and second (23) p-n-p additional T, whose bases are connected to the gain control circuit (24), the emitter of T (22) is connected to RCS (25) and through the first (26) auxiliary resistor to the current input (3) of the first DS, the emitter of T (23) is connected to RCS (27) and through the second (28) auxiliary resistor to the current input (9) of the second DS, where the first current output (5) of the first DS is connected to the first input (16) of the output current adder (15), the second current output (6) of the first DS is connected to the second input (17) of the output current adder (15), the first current output (11) of the second DS is connected to the second input (20) of the output current adder (15), and the second current output (12) of the second DS is connected to the first input (19) of the output current adder (15). |
Complementary differential amplifier with controlled gain / 2384938 Invention relates to radio engineering and communication and can be used in automatic gain devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier is the basic block of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The complementary differential amplifier (CDA) has a first (1) differential stage (DS) having first (2) and second (3) potential inputs, a current output (4) connected to the first (5) input of an output current adder (6), first (7) reference current source (RCS) connected to the common emitter circuit (8) of the first (1) DS, a second DS (9) having first (10) and second (11) potential inputs connected to corresponding first (2) and second (3) potential inputs of the fist DS (1) and first (12) and second (13) inputs of the CDA, as well as a current output (14) connected to the second (15) input of the output current adder (6), a second (16) RCS connected to the common emitter circuit (17) of the second DS (9). The circuit includes a first additional transistor (T) (18) whose emitter is connected through a first additional resistor (19) to the common emitter circuit (17) of the second DS (9) and the first additional (20) RCS, the base is connected to the first control input (21) of the CDA and the collector is connected to the common emitter circuit (8) of the first DS (1). |
Complementary cascode differential amplifier with controlled gain / 2388137 Invention relates to radio engineering and communication and can be used in automatic gain control devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier is the basic block of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The complementary cascode differential amplifier with controlled gain has first (1) and second (2) input transistors (T), whose collectors are connected to the input (3) of a current mirror (4), first (5) and second (6) output T, whose bases are combined and connected to the output (7) of the current mirror (4) and a current stabilising two-terminal circuit (8), emitters are connected to corresponding emitters of the first (1) and second (2) input T, and collectors are connected to a load circuit (9). The circuit has a first (10) control T, whose emitter is connected to the first reference current source (11) and through first (12) and second (13) additional resistors to emitters of the first (1) and second (2) input T respectively. |
Differential amplifier with controlled gain / 2388138 Invention relates to radio engineering and communication and can be used in automatic gain control devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier is the basic block of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The differential amplifier (DA) has first (1) and second (2) input transistors (T), whose emitters are connected to each other through anti-parallel connected first (3) and second (4) p-n junctions and connected to the first (5) and second (6) reference current sources, a load circuit (7) connected to collectors of the first (1) and second (2) input T, a third reference current source (8) connected to the common point of anti-parallel connected first (3) and second (4) p-n junctions. The circuit has a first (11) and a second (12) control T, whose bases are connected to the control input (13) of the DA, combined collectors are connected to the third reference current source (8), the emitter of the first (11) control T is connected to the emitter of the first (1) input T, and the emitter of the second (12) control T is connected to the emitter of the second (2) input T. |
Cascode differential amplifier with controlled gain / 2388139 Invention relates to radio engineering and communication and can be used in automatic gain control devices, phase detectors and modulators, in phase-locked loop and frequency multiplication systems or as an amplifier whose voltage transfer ratio depends on the control signal level. The controlled amplifier is the basic block of modern systems for receiving and processing high-frequency and microwave signals, and analogue computer and measurement equipment. The cascode differential amplifier with controlled gain has an input voltage-to-current converter (1), having first (2) and second (3) inputs and first (4) and second (5) current inputs connected to emitters of the first (6) and second (7) output transistors, load elements (8) connected to collectors of the first (6) and second (7) output transistors, a bias voltage source (9) connected to the base of the first (6) and second (7) output transistors through the first (10) and second (9) antiphase sources of the amplified signal. A first additional capacitor (12) is connected between the emitter of the first (6) output transistor and the power supply bus, and collectors of the output transistors (6) and (7) are connected to each other and to the load element (8). |
Method of monitoring fiber-optical circuit / 2247347 Method comprises feeding the standard optical signal to the light guide to be tested and measuring reflected signal. The oscillation of the signal power with the amplitude exceeding that of the initial level indicates the presence of a defect. |
Optical amplifier and optical transmission line / 2248087 Proposed controllable optical amplifier designed to transfer wavelength-multiplexing signals has, respectively, first gain control device (OE1, OE2, R1) and second dominating control device (OE2, R2, R1) having much slower output power control characteristic (Pout)in compliance with basic sold power (Psold). Transmission lines equipped with such amplifiers are characterized in that both fast changes in level and slow changes in attenuation can be compensated for in them. |
Method for detecting slow leak of optical radiation through side surface of fiber-optic communications line / 2251810 Method includes receiving optical signal from fiber-optic communications line, detecting these, comparing current values of signal in digital form to control value of signal, being one of previous signal values and alert signal is generated, in case of unsanctioned access deviations of previous signal values with consideration of sign are summed on basis of support value, being one of previous signal values, total deviation value in recording device is recorded, current total value of signal deviations is compared to recorded threshold value, alert signal is generated also in case when current total value of threshold value deviations is reached. |
Method for identification of damaged optical fiber / 2256161 For identification of a damaged optical fiber the control characteristic of the backward scattering of the optical fiber is preliminary measured, it is memorized subsequently with a preset time interval, periodically measured the current characteristic of the backward scattering of the same fiber at the same parameters of sounding, and the damaged optical fiber is identified as a result of comparison of the control and current characteristics of the backward scattering of the optical fiber, the matrix is calculated at this time , where - the covariation matrix of the control and current characteristics of the backward scattering of the optical fiber, and - the dispersion of the control characteristic of the backward scattering, and the optical fiber is identified as a damaged-one at a deviation of even one of the members of matrix from unity by more than the preset threshold value. |
Method of diagnosing damages in tested object / 2262680 Device can be used for diagnosing damages by means of thin-filmed threshold-type detectors. Site is found and fact of mechanical damage is established by means of measuring device generating measuring signal, which is sent registration system. Optical fiber is used as sensitive element. The fiber is bent to have specified radius of curvature in form of random line or zigzag-type line either grid along total surface of first dielectric base with preset pitch. Fiber is rigidly fixed between first and second dielectric bases made of optically transparent and elastic material. Bases are connected together by means of thermal-compression bonding. Fiber is connected to light source and to registration system interrogation control desk photoreceiver through shockproof optical connector. Optical detector is mounted onto surface of inspected object and modeling of process of damage of tested object is performed under effect of bullet or fragments of bursting ballistic element. Fact is established and sort of damage is identified due to processing of received data in electro-optical converter of registration system interrogation desk. |
Device for measuring bit error coefficients in fiber-optic communication lines / 2263402 Device additionally features microcontrollers, one of which generates gating pulses, guided into controlled fiber-optic line before test pseudo-random series, and second one, while receiving gating pulses, produces synchronization signals. |
Optical communication system with variable network limits / 2266620 Optical communication system, wherein signals (λ1, λ2, λ3...) with different wave lengths are transferred between terminals (T1, T2, T3,...) of communication network (IL1, IL2, IL3) and wherein only signals(λ1,λ2) are regenerated, because it is required by their quality parameters. Control system during taking of decision concerning place of regeneration considers structure and properties of communication network, including existing regeneration possibilities and possible routing of transmission lines. |
Method for adjusting information stream in optical data transfer networks / 2285343 Optical route passes between first position and second position, which is tracking point, containing: measuring the value of parasitic frequency modulation in tracking point, taking decision about non-linearity level in accordance to parasitic frequency modulation up to tracking point, in case when non-linearity level is considered higher than selected acceptable level, execution of one or several information stream adjustment operations for decreasing aforementioned non-linearity level is performed. |
Optical network with distributed regeneration of signals / 2294598 Method and device (10a) for regeneration of optical signals with one or several means (1a,1b,1c), which may regenerate one of several various optical signals (DB3,DB4,DC1,DC2,DC3,DC4), received by device (10a), while device contains means (12) for determining quality of received optical signals (DB3,DB4,DC1,DC2,DC3,DC4), and means (1a,1b,1c) for regeneration of signals only regenerate predetermined number of signals (DC1, DB4), for which worst quality has been determined by device (12) for determining quality. |
Method of determining optic fibre beat length at transmission line section / 2325037 At the near end of the optic fibre transmission line, an optical sounding pulse pattern is entered in the fibre optic. The Rayleigh back scattering signal received from the optic fibre at the near end is applied to the input of an optic radiation polarisation analyzer. At the output, the power of single polarisation optic radiation is received and the back scattering characteristic is measured. The sounding pulse length is set several times more than the beat length. Previously, the measured back scattering characteristic is converted so as to suppress distortions due to the form and final length of the sounding pulses. The periodic component is extracted and divided into elementary sections, and the beat length is determined for each elementary section, as half of the component period. |
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