SU864497A1 - Square pulse generator - Google Patents

Description

(54) GENERATOR OF RECTANGULAR PULSES

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The invention is intended to generate rectangular forksh pulses and can be used in computer and computer applications. A controlled pulse generator is known, which contains a counter, a master oscillator, a matching element, a counting trigger 1. The disadvantage of this device is its limited functionality. The closest in technical essence to the proposed is a device comprising a counter, connected by a counting input to a master oscillator, a duration code sensor, an interval code sensor, a differentiating circuit, a counting trigger, a coincidence element 2j. The disadvantage of this device is its complexity and low reliability. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that in a device containing a counter connected to a master oscillator by a counting input, a duration code sensor, an interval code sensor, differential. a firing circuit, a counting trigger, a matching element, a two-channel group multiplexer is inserted, the output of the duration code sensor is connected to one group of information inputs of the multiplexer, the interval code sensor outputs are connected to another group of information inputs, a multiplexer, the address input is connected to the corresponding output of the counting trigger, outputs the multiplexer is connected to the first group of inputs of the coincidence element, the second group of inputs of which is connected to the outputs of the counter, and its output connected through a differentiating circuit to the reset input of the counter and to the counting input of the trigger. The drawing shows a diagram of the proposed square pulse generator. The device contains a counter I, a master oscillator 2, a sensor 3 of a duration code, a sensor 4 of an interval code, a differentiating circuit 5, a group two-channel multiplexer 6, a counting trigger 7 and a coincidence element 8, and counter 1 is connected by a counting input to the output of a master oscillator 2 , the sensor 3 of the duration code is connected by its outputs to the group

the inputs of one channel of multiplexer b, the outputs of the code sensor of interval 4 are connected to the input group of another channel of multiplexer b, the outputs of which are connected to one group of inputs of matching element 8, and the outputs of counter 1 are connected to another group of inputs of matching element 8, the output of matching circuit 8 is connected with the input of the differentiating circuit 5, the output of which is connected to the counting input of the trigger 7 and the reset input of the counter 1, the output of the counting trigger 7

connected to the address input of multiplexer b,

The proposed device works as follows.

From sensor 3, parallel binary codes are fed to a group of inputs of one of multiplexer b channels, and simultaneously from sensor 4, parallel binary codes are fed to a group of inputs of another channel of multiplexer b, which depends on the state of the counting trigger 7 on either sensor outputs 3 or

the outputs of sensor 4, while zhg time to another group of inputs of the element 8 sov-. drops from counter 1; codes occurring on its outputs when pulses are counting from master oscillator 2. Pulses are counted by counter 1. Continuing until the code formed at the output of counter 1 and the code already entered in element 8 coincides; a signal appears at the output of coincidence element 8, which, through differentiating circuit 5, zeroes counter 1 and simultaneously triggers the trigger to a new state, and since the output of trigger 7 is connected to the address input of multiplexer b, the last one connects to the element group match its inputs from the second sensor. For example, if the outputs of sensor 3 are connected, then the outputs of sensor 4 are connected, and vice versa. This image is obtained from trigger output 7. a sequence of square pulses with a given duration and interval. The duration of stay of the trigger 7 in the first and second states (respectively, the duration of the pulse and the duration of the interval) is determined by the codes that are fed to the coincidence element 8. with alternately from two sensors 3 and 4 and the frequency of the master oscillator.

The positive effect is proposed-. device consists in increasing the reliability of its operation, simplifying the circuit and reducing the cost as a result of reducing the number of connections and elements in the circuit due to the fact that there is a reduction in one n-bit matching circuit of a group of n OR schemes associated with 5 abbreviated a coincidence circuit, one OR circuit associated with a trigger and a counter, and one differentiating circuit.

Claims (2)

1. Author's certificate of the USSR 432662, cl. H 03 K 1/00, 1974. 2. USSR author's certificate number 452056. class. H 03 K 1/18, 1974. -H and