SU936401A1 - Pulse train shaping device - Google Patents

Description

(54) DEVICE FOR THE FORMATION OF A SERIES AND STANDS

one

The invention relates to: a pulse technique and can be used as a program generator of a pulse number code in discrete control and monitoring systems.

A device for generating a series of pulses is known, comprising a pulse generator, a distributor, two multiplexers, a program control unit, a trigger, and a coincidence element tl3 "

This device allows, according to the stored program, to change the number of pulses in a series and the period of a series following, but it has insufficient reliability due to its complexity.

The closest in technical essence to the invention is a device for forming a series of pulses, comprising a pulse generator, a main and additional counter, a trigger, elements of a match, and a software control unit 2.

Such a device makes it possible, according to the stored program, to change the number of pulses in a series, but the period of the series following is constant, moreover, this device is also difficult and, as a result, has a low reliability.

The aim of the invention is to enhance the functionality by adjusting the period following a series of pulses and increasing reliability.

Claims (2)

This goal is achieved by the fact that in a device for forming a series of pulses, containing a pulse generator, the output of which is connected to the first input of the NAND element, a program control unit, the first group of outputs of which is connected to the discharge inputs of the first pulse counter, the program control input is connected with the output of the second pulse counter, an additional NAND element is added, the first input of which is connected to the pulse generator code, the second input is connected to the output of the second pulse counter, and the output An additional IS-NOT element is connected to the subtract from the main input of the second pulse counter, whose control input is connected to the output of the first pulse counter and to the second input of the main AND-NOT element whose output is connected to the subtracting input of the first pulse counter whose control input is connected to the output of the program control unit, the second group of outputs of which is connected to the bit inputs of the second counting pulses. The drawing shows fuststsionalna device. The device for forming a series of pulses contains a generator 1 of pulses 5 counters 2 and 3. pulses, software control block 4, elements 1Х 5 and 6. The device works in the following way. In the initial state counters 2 and 5 are in the zero state, the logical zero their outputs, the post to the second inputs of the corresponding elements AND-NOT 5 and 6, prohibits the passage of pulses from the generator I5 at the inputs of the parallel recording of counter 2, there is a binary code of the number A ;, J where A is the number of pulses in the first series according to the program, and on entrance dah of parallel recording of counter 3, there is a binary code of the number where B determines the required dg: interval interval after the first series according to the program, the signal from the cycle output of the program control unit 4 rewrites the code of the number A into counter 2, and the state is set at its output of the loan logical unit that allows the passage of pulses from generator 1 through the element AND NOT 5 to its subtracting input. Upon receipt of the number A. Pulses, the count. Chick 2 will be set to the zero iffle state, and a logic zero signal will be set at its output, which prohibits the passage of pulses from generator 1 through the AND-NOT element 5 and records the code of the number B; to the counter Zv At the output of the counter 3, the state of the logical unit is set, which allows the generator C to pass, 1 through the IS-NE 6 element to its subtracting input. When the number of pulses B arrives, the counter 3 is set to the zero state, the logic zero signal at its output prohibits the passage of pulses from generator 1 through the IS-NOT 6 element and the same signal, entering the software control unit 4, sets at its information outputs successive codes of numbers Bfj according to the program. Then it goes to the input of the software control unit 4, as a result of which the code of the number of AO is written to the counter 2 and the state of the logical unit is again set at its output. In the same way all subsequent cycles of operation of the device proceed. Thus, this device in comparison with the known ones has a higher reliability due to a simpler circuit implementation and possesses wider functional capabilities due to controlling not only the number of pulses in a series, but also the period of their following. The device for forming a series of pulses, containing a pulse generator, the output of which is connected to the first input of the NAND element, a program control unit, the first group of outputs of which is connected to the discharge inputs of the first Pulse counter, the input of the program control block e a pulse counter, characterized in that, in order to expand its functionality and ensure reliability, an AND-NOT element is additionally introduced into it, the first input of which is connected to the output of the gene pulse output, the second input is connected to the output of the second pulse counter, and the output of the additional element IS-NOT is connected to the subtractive input of the second pulse counter, the control input of which is connected to the output of the first pulse counter and the second input of the main element AND-NOT whose output is connected to subtract the input of the first pulse counter, the control input of which is connected to the output of the program control unit, the second group of outputs of which is connected to the bit inputs of the second pulse counter. Sources of information taken into account in the examination 936401 1. USSR author's certificate No. 677078, cl. H 03 K 3/64, 1978. 2. Authors svdedelstvo USSR № 632063, cl. H, 3 K 3/64, 1976.