SU1647862A1 - Pulse sequence driver - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automation and computing devices. The purpose of the invention is to expand the functionality by additionally forming a sequence of pulses with a predetermined frequency. The goal is achieved by introducing the element OR 3 and the element 6 coincidence. The device also contains a pulse counter 1, an OR element 2, a trigger 4, a coincidence element 5, a clock pulse generator 7, a code bus 8, output buses 9 and 10. 1 sludge.

Description

The invention relates to a pulse technique and can be used in automation and computing devices.

The purpose of the invention is to expand the functionality by additionally forming a sequence of pulses with a predetermined pulse frequency.

The drawing shows an electrical functional diagram of the proposed driver.

The pulse trainer includes a pulse counter 1, a first 2 and a second 3 elements OR, a trigger 4, a first 5 and a second 6 elements of a match, a generator of 7 clock pulses. The information inputs of the pulse counter 1 are connected to the code bus 8, the output to the corresponding inputs of the first element OR 2, the output of which is connected to the D input of the trigger 4 and to the first input of the first coincidence element 5, the second input of which is connected to the clock generator 7 and With the trigger input 4, the direct output of which is connected to the first

the output bus 9 and the third input of the first coincidence element 5, the output of which is connected to the second output, bus 10 and the counting input of the pulse counter 1, and the inputs of the second element OR 3 are connected to the code bus 8, the output - to the first input of the second co-alignment element 6 The direct output of which is connected to the recording input of the pulse counter 1, the inverse output to the fourth input of the first coincidence element 5, the second input to the inverse output of the trigger 4.

The shaper works as follows.

In the initial state on bus 8, the zero code, the counter 1 is zero, the outputs of elements 3, 6, 2 and 3, the output buses 10 and 9, the output of the trigger 4 are zero levels. On the inverse outputs of the trigger 4 and element 6 - unit levels. The generator 7 generates a continuous pulse sequence. The former is in the initial state until then. until a code other than zero arrives on bus 8.

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When a code other than zero arrives on bus 8, a single level is formed at the output of element 3, which passes through element 6 and enters the record input of counter 1.

In the counter 1, a code different from zero is entered from the bus 8, according to which a unit level is set at the output of the element 2. The unit output level of the element 2 enters the D-input of the trigger 4 and, on the leading edge of the output pulse of the generator 7, switches to the unit state. Thus, on bus 9, a single level is set — the start of the generated pulse width. The zero level of the inverse output of the trigger 4 overlaps the element 0, forming a zero level at its output, on the inverse one - single.

The zero level of the output of element 6 blocks the entry of the code from the busses 8, the unit level of the inverse output of element 6 permits the output pulses of the generator 7 to pass through element 5 to the bus 10 and to the counter input of counter I. On the falling edge of the output pulse of element 5 to counter 1 of entered from the tires 8, the unit is subtracted; at the same time, the first pulse from the output of the element 5 is fed to the bus 10 by the generated pulse train. Further, element 5 repeatedly passes pulses, the unit level at the output of element 2 confirms the non-zero state of counter 1, and in counter 1 the code decreases. On the trailing edge of the nth pulse of the output of element 5, the zero code is set in counter 1, and the output of element 2 is set to zero. On the leading edge of the next pulse of the output of the generator 7, the trigger 4 returns to its initial state, and the bus 9 sets the zero level. In this case, the unit level of the inverse output of the trigger 4 is fed to the input of the element 6. If the status of the bus code 8 has not changed, then this code

is entered into counter 1, and then the process repeats as described. If the bus code 8 is changed to zero, then entering into the counter 1 at the end of the issue is not performed, since at the input of the resolution the entry of the counter code 1 is a zero level.

Thus, controlling the duration of the code setting on tires 8, you can set the necessary number on bus 9

impulses, i.e., the former can operate as a controlled frequency divider with a pulse following period T - (N + 1) TTI, where N is the code value on tires 8; TSN - the period following the clock

generator pulses 7.

Claims (1)

Claims pulse shaper comprising a pulse counter whose information inputs are connected to a code bus, outputs to the corresponding inputs of the first OR element, the output of which is connected to the D input of the trigger and the first input of the first match element, the second input of which is connected a clock pulse generator; and a C trigger input, the forward output of which is connected to the first output bus and the third input of the first match element, the output of which is connected to the second output bus and to the counting input of the pulse counter, characterized in that. in order to extend the functionality by additionally forming a pulse train with given the following frequency, the second coincidence element and the second OR element are entered into it, the inputs of which are connected to the code bus, the output to the first input of the second coincidence element, the second input which is connected to the inverse trigger output, direct output - to the input of the pulse counter recording, inverse output - to the fourth input of the element I.  i