SU1128377A1 - Device for selecting single pulse - Google Patents

Abstract

DEVICE FOR ISOLATION; A SINGLE PULSE containing a synchronous 0-trigger, the unit output of which is connected to the first input of the NAND element, and the clock input of the synchronous OT. -trigger through the inverter is connected to the pulse clock bus and to the second input of the NAND element, the output of which is connected to the zero input of the asynchronous trigger, and the control bus, which differs from THAT, in order to increase the resolution on the control input, simplify and enhance reliability, the single output of the asynchronous Trigger is connected to the information input of the synchronous) trigger, the zero set input of which is connected to the control bus and to the single input of the asynchronous trigger. (P

Description

The invention relates to a pulse technique and can be used in devices for automation and computing technology. Known shaper single pulses, containing synchronous and asynchronous triggers, two element AND-NOT and inverter ij. The drawbacks of the device are the low stability of the output signal duration, the low input resolution and the complexity of its circuit implementation. The closest technical solution to the invention is a device for extracting a single pulse containing a synchronous Or-trigger, the single output of which is connected to the first input element , and the clock input of the synchronous BH-trigger through the inverter is connected to the clock pulse bus and to the second input of the NAND element, the output of which is connected to the zero input a an synchronous trigger, a control bus connected to the information input of the Yu-trigger, a zero input and an output of the asynchronous trigger via an additional AND-NOT element connected to the third input of the AND-NOT element, and a single output 3) -trigger to the single input of the asynchronous trigger 2 . The disadvantages of the known technical solution are the low resolution of the control input, limited by the period of clock pulses, the complexity of the circuit implementation and low reliability, due to the possibility of the occurrence of spurious output signals when the switch is turned on. The purpose of the invention is to increase the resolution on the control input, to simplify and increase the reliability of the device for separating a single pulse. The goal is achieved by the fact that in the device for selecting a single pulse, containing a synchronous Di-trigger, a single output of which is connected to the first input of the NAND element, and the clock in synchronous 33-trigger through the inverter is connected to the clock pulse bus and to the second input i-NOT element, the output of which is connected to the zero input of the asynchronous trigger, and the control bus, one output, of the asynchronous trigger connected to the information input of the synchronous 1) .- trigger, zero setting input connected to the bus ION with single asynchronous trigger input. The drawing shows a functional diagram of a device for separating a single pulse. A device for extracting a single pulse comprises a synchronous trigger 1 of type I, an asynchronous trigger 2, inverter 3, an AND-NE element 4, a control bus 5, a bus 6 clock pulses and an output bus 7. The device for separating a single pulse operates as follows. In the initial state, when there are no signals on the control bus 5, the low voltage level from it goes to the zero setting input of the synchronous trigger and the unit one. the input of the asynchronous trigger 2. As a result, a low (zero) level is set at the single output of the trigger 1, which, acting on the input, the IS-NOT element 4, sets its output, zero output of the trigger 2 and the output bus 7 to the unit voltage level. When a single voltage level pulse arrives on the bus 5, trigger 1 is unlocked at the zero setting input, and with the arrival of the next pulse edge at the clock input of trigger 1, the latter switches to a single state, since at its information input there is a single voltage level from the trigger output 2. With the arrival of a unit level of the clock pulse from the bus 6, at the output of the NAND 4 element, a pulse of zero level is formed with a duration equal to the duration of the clock pulse present on the bus 6. At This trigger 2 is switched, and a zero voltage level is generated at its output, which ensures that trigger 1 is set to the zero state on the next clock edge, prohibiting the next clock pulses to pass through the output bus 7 to the output bus 7. At the end of the pulse on the control bus 5, the device is automatically set to

3 11283774

initial state and ready to receive an infrequent control signal after

next control signal. ending the previous signal through

 .time due only to time

Thus, the proposed mouth-triggering asynchronous trigger,

Performance with minimal hardware-j with high reliability when turned on

cost provides reception of oche-power device.

Claims (1)

A DEVICE FOR SELECTING A SINGLE PULSE containing a synchronous trigger, a single output of which is connected to the first input of an AND-NOT element, and the clock input of a synchronous D ₄ trigger through an inverter is connected to a clock bus and to a second input of an AND-NOT element, whose output is connected with a zero input of the asynchronous trigger, and a control bus, characterized in that · in order to increase the resolution of the control input, simplify and increase reliability, a single output of the asynchronous trigger is connected to the information input ohm synchronous!) ^ -trigger, the zero installation input of which is connected to the control bus and to the single input of the asynchronous trigger. = 00 m <1