SU544111A1 - Pulse shaper - Google Patents

Description

The invention relates to the field of immersion technology and can be used, for example, in input devices of computers.

Pulse drivers are known for temporally matching the input signal with computer clock generator pulses, containing triggers, drivers, AND-NOT elements, inverters l.

However, the schemes of such drivers

are complex.

Also known pulse shaper, containing three trigger, two elements And the element NOT 2J.

However, such a driver does not allow to obtain from an unsynchronized sequence of signals a synchronized sequence of pulses, the duration of which is equal to the period of operation of the clock generator.

The purpose of the invention is to increase the stability of the duration of the output pulses.

This goal is achieved due to the fact that in a pulse shaper containing three flip-flops, two AND elements, an NOT element whose input is connected to the first input of the first And element, another input of the first And element is connected to the first input of the first trigger, the second output of which is connected to the second input of the second element And, the first input of the second element And connected to the output of the element NOT, the outputs of the first and second elements And connected, respectively, to the first inputs of the second and third triggers, the outputs of which are connected to the corresponding third inputs of first and second AND gates and to the first trigger input.

The drawing shows a structural electrical circuit of the pulse former.

The pulse shaper consists of the first 1, second 2 and third 3 triggers, the first 4 and second 5 elements AND, the element NOT 6; 7 - clock bus, 8 - O installation bus, 9 - device bus, 10, 11 - first and second output driver shaper, respectively.

Powered pulse shaper works in a small way. At the initial moment, the potential of the low level arriving on the bus 8 triggers 1, 2 and 3 are set to state O, bus 9 has a low potential, at the outputs of elements 4 and 5, and tires 10 and 11 have a low potential. Pulses from the clock generator via bus 7 do not change the condition of the shaper elements. In the case of a high potential on bus 9 at all inputs of the element 4, there is a high potential, which from the output of the element 4 is fed to the input of the trigger 1. The first high-potential impulse arriving on the bus 7 sets the trigger 1 to the state 1, forming on the bus 10 the leading edge of the pulse corresponding to the leading edge of the input signal. The potential of the low level from the first output of the trigger 1 trigger 3 is set to state 1, and a low potential is formed at the output of the element 4. The next high-level impulse arriving via bus 7 to the trigger input of trigger 1 will set the latter to its initial state and on bus 10 a pulse of duration equal to the period of clock pulses will be generated. The arrival of new pulses through the bus 7 does not change the condition of the elements of the former. In the event of a low potential on the bus 9, the output of the element NOT 6 will have a high potential, that is, at all inputs of the element 5 there is a high potential, which from its output goes to the input of trigger 2, Now the very first impulse with high potential coming through bus 7 will set the trigger 2 to state 1, forming on the bus 11 the leading edge of the pulse corresponding to the decay of the input signal. At the same time, however, the low potential from the first output of the trigger 2 arrives at the input of the element I 5 and sets the trigger 3 to the initial position. Since now the output element And 5 low potential, the second impulse with

07/30/73.

2. USSR author's certificate No. 333686, M.Kl.N 03 K 5/01 from 05.10.70. (prototype). by a high level, incoming via bus 7 will set trigger 2 to O, forming a pulse on bus 11, the duration of which is equal to the period of clock pulses, and all the elements of the driver will be in the initial state. The shaper is ready to receive the next signal. Thus, with high reliability of operation, this pulse shaper allows to obtain synchronized pulses on separate functional buses, the duration of which is equal to the period of clock pulses. This makes it possible to significantly simplify the reception and synchronization of signals in the input devices of computers.

Claims (1)

 The invention The pulse shaper contains three triggers, two elements I. An element NOT whose input is connected to the first input of the first element And another input of the first element And is connected to the first output of the first trigger, the second output of which is connected to the second input of the second element And, the first the input of the second element AND is connected to the output of the element NOT, characterized in that, in order to increase the stability of the duration of the output pulses, the outputs of the first and second elements AND are connected, respectively, to the first inputs of the second and retego triggers, whose outputs are connected to respective third inputs of first and second AND gates and to the first trigger input. Sources of information taken into consideration in the examination: 1. USSR Copyright Certificate 453791, M. Кл. H 03 K 5/153 from ff W . eight