SU487450A1 - Device for forming a series of rectangular pulses - Google Patents

Description

one

The invention relates to radio engineering, can be used in automation devices and electrical measuring equipment.

A device for forming a series of square-wave pulses containing an adder, whose counting trigger inputs are connected to the outputs of the first group of pulse-potential gates, the OR element connected by one of the inputs to the adder output, the trigger trigger, and the delay element are known.

The purpose of the invention is to change the number of pulses in each series.

The proposed device differs in that it additionally contains a summing counter, the trigger outputs of which are bitwise connected to the potential inputs of the first group of gates, and the counting inputs to the outputs of the second group of valves connected to the potential inputs of the adder, and pulse inputs are through an additional delay element - to the input of the installation of the direct code of the adder and the output of the time of the master circuit connected by the input to the output of the adder and to the first input of the element "OR connected th second input to the output of trigger flip-flop, and the output - to the pulse inputs of the first group of valves.

The drawing shows a block diagram of the device.

A device for forming a series of rectangular pulses comprises an adder 1,

the counting inputs of the triggers of which are bitwise connected to the outputs of the group of pulsed potential gates 2, the element “OR 3, connected by one of the voltages to the output of the adder, the trigger trigger 4, the delay element 5.

The outputs of the trigger of the summing counter 6 are bitwise connected to the inputs of the valve group 2, and the counting inputs to the outputs of the group of valves 7 connected by potential inputs are bitwise to the outputs of the trigger of the adder 1 and the pulse inputs of the direct code adder and to the output time of the driving circuit 9 connected by the input to the output

the adder and to the first input of the element “OR 3, connected by the second input to the trigger output 4, and the output to the pulse inputs of the valve group. 2. The device works as follows.

When a trigger pulse is applied to the input, trigger 4 switches, and its output pulse through the element OR 3 through a group of valves 2 transfers the number from - to, stored in the counter 6, to the adder 1. Since the number

, an overflow pulse appears at its output, and the number a - c remains in the adder. The overflow pulse enters the output of the device, the delay element 5 and the time setting circuit 9. After a period of time determined by the duration of the feedback, the output pulse through the group of valves 2 again transfers the number from - to from counter 6 to adder 1. If (a - b) .0, an overflow pulse appears again at the output of the adder, and the number a - 2c will remain recorded in the adder.

In the following, the processes described are cyclically repeated.

Finally, after the overflow of adder 1, the relation (a - qib, b) takes place. As a result, when (71 + 1-th entry of the number c - 6 from counter 6), the number c- (9i + l) 6-ba is underestimated, and the accumulator overflow pulse does not occur.

After a period of time, defined by time by circuit 9, the output of circuit 9 drops a pulse that changes the code from c- (qi- - b -} - a of the adder to () b-a and through delay element 8 by means of a group of gates 7 transfers the number (i + l) - from adder 1 to counter 6. As a result, the contents of counter 6 become equal to c- - (. At that, (qi-) ba. During the installation process, the code (qi - {- b to adder An overflow impulse appears at its output. This impulse is the first output impulse of the second series. Passing through the feedback circuit, it is through the valve ground 2 again tolerated by the counter 6 in the contents of the adder 1 and t. d.

In the following, the processes in the circuit are repeated until the contents of adder 1 become equal to zero. In this case, a series of pulses are formed at the output of the device.

The pulse period in each series is determined by the delay time of the delay element 5, and the sequence frequency of the series is determined by the time interval emitted by the time by the driver 9.

PREDMET of the invention

A device for forming a series of rectangular pulses comprising an adder,

the counting inputs of the triggers of which are bitwise connected to the outputs of the first group of pulse-potential gates, the OR element connected by one of the inputs to the output of the adder, the trigger trigger and the element

delays, characterized in that, in order to change the number of pulses in each series, it additionally contains a summing counter, whose trigger outputs are bitwise connected to the potential inputs of the nerve

valve grounds, and counting inputs to the outputs of the second group of valves connected by notional inputs are bitwise to the outputs of the adder trigger, and pulse inputs through the additional delay element to the input of the direct adder code and output of the master circuit connected by the input to the adder output and to the first input of the element “OR, connected by the second input to the output of the trigger trigger, and the output to the pulse inputs of the first group of valves.