SU915065A1 - Aternating signal amplitude stabilizer - Google Patents

Description

The invention relates to the field of electrical engineering and can be used to stabilize the voltage of various radio engineering devices, such as frequency synthesizers, phase meters, which specify the generators of precision measuring systems.

Known stabilizers amplitude of the alternating signal, in which the compensation of changes in the amplitude of the alternating signal is performed by processing the rectified (detected, filtered) signal voltage [1].

The closest in technical essence to the invention is a stabilizer containing a controlled amplifier connected between the input and output terminals, a differential amplifier, one input of which is connected to the source of the reference signal, and the output to the regulating input of the controlled amplifier [2].

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A disadvantage of the known devices is low speed.

The purpose of the invention is to increase the speed of the device.

This goal is achieved by introducing into the known device of the phase shifter, the first and second quadrants and the adder, and the input of the first quadrant is connected to the output terminal, where the input of the phase shifter is also connected, the output of which is connected through the second quad to the first input of the adder However, the output of the adder is connected to another input of the differential amplifier.

The drawing shows a block diagram of the stabilizer amplitude of the variable signal.

The stabilizer consists of a controlled amplifier 1, a phase shifter 2,

first and second quadrants 3 and 4,

915065

adder 5, differential amplifier 6.

The device works as follows.

Device output voltage

fed to the input of the first quad and the input of the phase shifter. At the output of the phase shifter, a voltage of 1C = AUsCS is formed, which is fed to the input of the second quadrant 4. At the outputs of the first and second quadrants, there is respectively a voltage = Α ^ δνΙ and ϊ-ϊ ^ = А ^ Co5% gs. As a result of summing these voltages, the voltage of the first input of the Differential Amplifier

and c = and, + and, = Α ^ δϊη ^ κΐ + a ^ ches ^ m! = A * *

A voltage is applied to the second input of the differential amplifier.

The signal output from the differential amplifier 6 changes the gain of the amplifier 1 and managed as long as the difference Δ- - ₀ 11 n becomes equal ^to zero, i.e. at the output of the device, the amplitude of the alternating signal is constantly maintained, which is given by the voltage value C> _{P |} moreover, the compensation of deviations of the signal amplitude is carried out when the instantaneous value of the voltage of the alternating signal deviates from the desired value, which significantly increases the speed of the device.

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Introduction to the known device of the phase shifter, the two quadrs and the adder can significantly increase the speed of the device at low hardware costs.

Claims (1)

Claim An amplitude stabilizer of an alternating signal containing a controlled amplifier connected between the input and output terminals, a differential amplifier, one input of which is connected to the reference source, and the output to the regulating input of the controlled amplifier, in order to increase the stabilization speed , a phase shifter, two quadrs and an adder are entered into it, and the input of the first quad is connected to the output terminal, where the input of the phase shifter is also connected, the output of which through the second quad is connected nen to a first input of an adder, whose second input is connected to the output of the first squarer, wherein the combiner output is connected to another input of the differential amplifier.