SU1309286A2 - Device for monitoring pulses - Google Patents

Abstract

The invention relates to the field of pulsed technology and is an improvement of the invention according to the author. St. N & 780177. Introduction to the device for monitoring pulses of the one-shot 7 and the element OR 3 increases the reliability of the control. 2 Il. W C, AE

Description

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The invention relates to a pulse technique, can be used in a computer and digital; level systems and is an improvement on the device auth. St. No. 780177.

The aim of the invention is to increase the reliability of the control.

FIG. 1 shows a functional diagram of a device for controlling pulses; in fig. 2 - timing diagram of its operation.

The device for controlling pulses contains the first 1, second 2, third 3 two-input logic elements OR, delay element 4, trigger 5, reversible counter 6, one-shot 7, two decoders 8 and 9, actuator 10, input buses 11-13.

The first 11 and second bus 12 devices are connected respectively to the inputs of the trigger 5, as well as to the inputs of the first logic element OR 1. The third bus 13 of the device is connected to the first input of the third logical element OR 3, the output of which is connected to the installation input in “About the reversible counter 6 The input of the actuator 10 is connected to the output of the second logic element OR 2, the inputs of which are connected to the outputs of the decoders 8 and 9, the inputs of which are connected to the outputs of the reversible counter 6, the control inputs of which are connected to you trigger moves 5, and the counting input with the output of the delay element 4, the input of which is connected to the output of the first logic element OR 1.

The one-shot 7 serves to generate a pulse to set the reversible counter 6 to the zero state when switching the trigger 5. The one-shot 7 generates pulses along the front and rear edges of the signals at the output of the trigger 5. The duration of the pulses generated by the single vibrator 7 is selected as short as possible, ensuring it reliably zeroes the reversing counter 6.

The device for controlling pulses operates as follows.

Before starting the operation, the bus 13 of the device is given a signal of the initial installation, through which the reversible counter 6 is set to the zero state. Trigger state 5 is arbitrary. When a pulse arrives on the bus 11 or on the bus 12 of the device (Fig. 2a, b), the trigger 5 is set to some fixed state, suppose that the control input of the reversing counter 6 is set

A potential allowing summation is applied (if trigger 5 switches from the first pulse, the one-shot 7 generates a pulse (Fig. 2e) confirming that the reversing counter b is set to the zero state). In addition, the same input pulse passes through the first logical element OR 1 (Fig. 2b) and delay element 4 (Fig. 2d) to the counting input of the reversible counter 6, and the counter goes into the state "-fl. When a pulse arrives at the second bus of the device, i.e., at normal. mode of operation, this pulse triggers the trigger 5 to another fixed state (Fig. 2e), the reversible counter 6 by the pulse from the one-vibrator 7 (Fig. 2e) is set to the zero state, a potential is set at the control input of the reversible counter 6 the enabling subtraction, and the reversible counter 6, when the pulse arrives from the output of the delay element 4, is set to the counting input in the state "-1.

Thus, in the absence of distortions in the input pulses (skip or the appearance of an “extra pulse”)

5 of the up / down counter 6 is changed in the sequence O, -1-1.0, -1, 0, -L 1.0, -, ... or in the sequence 0, -1.0, - | -1.0, -1,0, -n 1, ... (which depends on which of the inputs receives the first pulse (Fig. 2g). At the output of the decoders 8 and 9, reacting

0 only to the +2 or -2 state, the signal is absent (Fig. 2h, and).

If one of the input pulses disappears, then the trigger 5 remains in some fixed state, while the reversible counter 6 counts two pulses

(Fig. 2g) coming from the 4 delay element. In this case, the output of one of the decoders 8 or 9 will pass the signal to the second logical element OR 2 and then to the actuating device 10 in the form

Q signal failure (Fig. 2k).

Claims (1)

Invention Formula Device for monitoring pulses auth. St. No. 780177, characterized in that, in order to increase the reliability of the control, a one-shot vibrator and a third OR element are introduced, the output of which is connected to the installation input in "About a reversible counter, the first input is connected to the initial setting bus, the second input is connected to the output of the single-vibration whose input is connected to one of the trigger outputs. FIG. g