SU1283981A2 - Device for stabilizing average frequency of noise shoots - Google Patents

Abstract

The invention relates to radio engineering. In relation to auth. No. 633146 provides the purpose of the invention to improve the accuracy of stabilizing the average frequency of noise emissions. The device contains an amplitude quantizer (AK) 1, a reversible counter 2, r-r 3 reference pulses, shaper 4 of the effective noise value. differentiating circuit (D1.0 5, digital controlled attenuator 6 and adder (C) 7. AK 1 performs two-level amplitude quantization of the input signal, resulting in the formation of standard amplitude pulses corresponding to emissions of the noise signal. In case of a change in the intensity of the input noise U 5 generates a signal proportional to the speed of this change, which is summed up in C 7 with the main auto-tuning signal of the threshold level AK 1. This prevents a sharp increase in the emission frequency at the summing input. 2 and the down counter associated with this increase in error overshoot. The aim is achieved by the introduction of DC 5 and 7. From 1-yl. c (N c

Description

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The invention relates to radio engineering, can be used in pulsed radar systems to maintain an average frequency of noise emissions at the inputs of automatic information processing devices and. is additional to the main auth. No. 633146.

The purpose of the invention is to improve the accuracy of stabilization of the average frequency of noise emissions.

The drawing shows a structural electrical circuit for stabilizing the average frequency of noise emissions.

The device for stabilizing the average frequency of noise emissions contains an amplitude quantizer 1, a reversible counter 2, a generator of 3 reference pulses, a driver 4 of the effective noise value, which differentiates the circuit

5, digital controlled attenuator

6, adder 7.

The device for stabilizing the average frequency of noise emissions works as follows.

The input signal will be fed to the inputs of the ampoutage quantizer 1 and the imager 4, which generates a voltage corresponding to the effective noise value. The signal from the output of the imaging unit 4 is fed through the differentiating circuit 5 to the second input of the adder 7 and to the input of the digital controlled attenuator 6, the transmission coefficient of which is determined by the digital code supplied to the address inputs from the reversing outputs

counter 2. From the output of the adder 7 of emissions, the output of the digital control is fed to the control input of the amplitude quantizer 1 and at the same time it is the first output of the device that determines the gain of the receiver and the threshold level of the quantizer 1. 45

In the amplitude quantizer 1 produced a two-level amplitude

A second attenuator is connected to the control input of the amplitude quantizer through the input adder, and the output of the shaper of the effective noise value is connected to the second input of the adder via the input differentiation circuit.

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quantization of the input signal, from the output of which the pulses of standard amplitude, corresponding to the emissions of the noise signal, arrive at the summing input of the reversible counter 2, and the pulses from the generator 3 of the reference pulses arrive at the subtracting input. The pulse frequency of the generator is 3 reference pulses avna of a given average frequency of the threshold level. Reversible counter 2 compares the actual average emission frequency with a given one, as a result of which the transmission coefficient of the digital controlled attenuator 6 changes, which leads to a change in the threshold level of amplitude quantizer 1 and, consequently, to a change in the average frequency of emissions of the noise signal.

In case of a change in the intensity of the input noise, the differentiating circuit 5 produces a signal proportional to the speed of this change, which is summed up in the adder 7 with the main auto-tuning of the threshold level, which prevents the increase in the emission frequency ya to the summing input of the reversing counter 2 and the error associated with this increase overshoot.

Claims (1)

Invention Formula The device to stabilize the average frequency of noise emissions on auth.St. No. 633146, characterized in that, in order to improve the accuracy of stabilization of the average frequency of the noise emissions, digital control output A second attenuator is connected to the control input of the amplitude quantizer through the input adder, and the output of the shaper of the effective noise value is connected to the second input of the adder via the input differentiation circuit.