SU569000A1 - Pulse-type frequency-phase discriminator - Google Patents

Description

one

The invention relates to a pulse technique.

Izvesti is a frequency-phase discriminator containing input logic elements AND, to the inputs of which discriminated signals are fed, triggers whose inputs through additional logic elements are connected to the outputs of the input elements AND, and outputs through the corresponding logical elements AND, OR, NOT to the inputs of the input elements And 1.

This discriminator is complex.

The closest to the claimed technical entity is the discriminator, which contains two AND input logic elements, one of the inputs of each of which is connected to the input source, and the output is connected to the input of the OR logic element, the output trigger with a counting input, which is connected to the output second logical element OR. The inputs of the latter are connected to the outputs of the two additional logic elements And, the first inputs of which are connected to the outputs of the corresponding input logic elements And, and the second inputs to the outputs of the second trigger, the input connected to the output of the first of the mentioned logical elements OR 2.

This discriminator is not reliable enough when changing the parameters of the input pulses.

The aim of the invention is to increase the reliability of the discriminator when changing the parameters of the input pulses. This is achieved in the proposed discriminator by introducing two additional logical elements OR, whose inputs are connected to the outputs of the specified triggers, and the outputs are connected to other inputs of the input logic elements I.

The structural electrical circuit of the discriminator is shown in the drawing.

The discriminator contains logic elements AND 1-4, logic elements OR 5-8, triggers 9, 10. Discriminated signals FI and P2 are fed to inputs 11 and 12, the output signal is removed from output 13. Power sources and signals to the drawing are not shown.

The principle of operation of the discriminator is as follows.

At the inputs 11 and 12 elements And 1 and 2 impulses with frequencies, respectively FI and FZ. On the second inputs, elements 1, 2 are controlled by signals from the outputs of the flip-flops 9 and 10. The input pulses through the logic elements 1-6 arrive at the counting inputs of the flip-flops.

The triggers are switched upon transition of signals at the counting inputs from 0 to "1. Thus, the triggers can be switched only after the end of the pulse arriving