SU737878A1 - Device for automatic monitoring of four-pole network transfer coefficient - Google Patents

Description

The invention relates to the field of measurement technology and can be used for the tolerance control of the transmission coefficient of active two-port networks, for example, amplifiers. A device for controlling a transmission coefficient is known. From the input and downstream directional couplers, part of the signal goes to the corresponding detector heads, the outputs of which are connected to the voltage ratio meter 1. In such a device, due to the presence of two power meters, there is a measurement error determined by the nonidentity of the characteristics of the RF power to DC converters (detectors) and their varying changes as the operating conditions change; besides there is no possibility in it. . , . 2 controls the level of the control signal g in the process of controlling the transmission coefficient, therefore it is impossible to determine at which point of the dynamic characteristics of the quadrupole the control of the transmission coefficient is performed. A device is known that contains a control oscillator, an object of control, detectors of input and output signals, a controlled attenuator, and a device & indicator, pulse shaper, scaling circuit, input device. Yes, the control unit, the frequency marker comparator, the logic gate 2. In the device, the voltage difference between the input and output signals is converted from time to time interval, which is converted into a code and displayed. The understeer of such a device is low reliability due to the large number of nodes. The purpose of the invention is to increase the reliability of the control. 3 - - 73; LYEPGDBSHGAT has the following information: the device has four transmitters, a connected generator, an input attenuator, an output attenuator, a series-connected detector and a comparison unit, a detector and a comparison unit, and a headset that can be used in the device, the output attenuator, the detector connected in series, and the comparison unit, which are connected to the detector and the comparison unit, which will be connected to the device. , the second comparison unit and the OR element, to the output of which the indicator is connected, with the outputs of the control generator and output attenuator connected to the inputs of the switch, K you ode kOl oporo pyDklyuchen detector. The output of the control driver is connected to the control inputs of the switch and the driver of the reference SRI, the outputs of which are connected to the antiphase inputs of the comparison units, the other inputs of the comparison units are connected to the output of the OR, .. For 4 mg .. 1 the structural scheme of the device is given; On t. 2 shows the effects on the inputs of the comparison blocks. . The device contains successively connected control generator 1, input attenuator 2, test quadripole 3, output attenuator 4. The outputs of the control generator 1 and output attenuator 4 are connected to the inputs of switch 5, the output of which is connected: to the inputs of the detector 6. The output of detector 6 is connected with anti-phase inputs of units 7 and 8 comparisons based on operational amplifiers. The other two counter-axes of the hereBrauSupplySch1515 with outputs of the former 9 ortopmjx voltages. Control generator 10 soy; pgaen with switch 5 and with input of driver 1X voltages. The outputs of the block are comparable to T: One second and the element OR 11, the output of which is connected to the indicator 12. The device functions as follows. The cat-finger signal from the control generator 1 through the input tester 2. enters Jrocledyemy ChoTyrehyolyusnik 3rd-simultaneously to one input of commutators 5 pa .. The output signal from the test Th tyrehpolyusnika 3 through an output attenuator 4 is supplied to the torus drzgtyuy input commutator 5. At the control input of the switch 5 to the control pulse generator 10 receives control kshee more intense frequency, many times less than the frequency of the control oscillator 1. After the detection of the detector, the output of the detector turns out to be pulses whose amplitude is proportional to the transmission coefficient of the quadripole 3 under study, with a frequency control voltage shown on. FIG. 2 (voltage C), the control voltage enters the shaper 9 reference voltages, where the voltages of the lower L and upper 6 tolerances are formed, respectively (Fig. 2). With the aid of pulsed reference voltages of the lower 1; 0 and upper tolerances, the input and output of the quadrupole and its transmission coefficient are monitored in the output and the output signal. If the transmission coefficient and the input signal of the quadrupole 8 under study are in the tolerance field, a positive voltage is present at the outputs of blocks 7 and 8 which, through the OR 11 element, goes to the indicator 12. If the signal from the control generator 1 decreases and goes out of the field tolerance, unit 7 will begin to generate pulses with the frequency of the control voltage. That's the thing. will occur if the transmission coefficient of the quadrupole under study 3 decreases. When entering beyond the limits of the upper tolerance of the control signal or transmission coefficient, the comparison circuit 8 will begin to shuffle. The invention The device for automatic control of the transfer ratio of the quadrupole, the most consistently connected control oscillator, input attenuator, output attenuator, serially connected detector and comparator unit, as well as an indicator that is available7Tt 4, C ffeftbfo increase in control quality, a control generator, a switch, a driver of the reference voltages, a second comparison unit and OR, to w 1 of which the indicator is connected, and outputs, are entered into it; Ancillary generator and an output attenuator are connected to the inputs. the switch, to the output of which the deTector is connected, the output of the control of the generator, is connected to the control inputs to the Mutator and the driver of the reference oscillator.;. Research institutes whose outputs are connected to antiphase inputs of the comparison units. The other inputs of the comparison units are connected to the detector output, and the outputs to the inputs of the OR element.

5737878

Sources of information, ma self-excitation. M., Sov. radyo

taken into account by experts from 1965.

1. Dvinskikh V. A. Measurement of parameters-2. Author's certificate (Wip

ditch amplifiers using mode-no. CP G OIR 27/28, 1975.

Claims (1)

Formula of the invention CONTROL Device for the automatic role of the coefficient of 'quadripole transmission,' with its generator connected in series to a control oscillator, input attenuator ₄ , output attenuator, sequentially connected detector and comparison unit, as well as an indicator, and so on that, With a chain for increasing the reliability of control, a control generator, a switch, a voltage driver, a second comparison unit and an OR element are introduced into it, to the output of which an indicator is connected, and you see _; the strokes of the control generator and the output 'attenuator are connected to the inputs. the switch, the output of which is connected to the detector, the output of the control generator is connected to the control inputs of the Mutator and the reference voltage driver, the outputs of which are connected to the antiphase inputs of the comparison blocks, the other inputs of the comparison blocks are connected to the detector output, and the outputs to the inputs of the OR element .