SU1462469A1 - Generator of random-duration pulses - Google Patents

Abstract

The invention relates to computing, in particular, to devices for generating pulses of random duration. The purpose of the invention is to simplify the generator. A pulse generator with a random duration contains a high-frequency pulse generator 1, the output of which is connected to the counting input of the first binary counter 2, a delay element 3, a second binary counter 4, a low-frequency pulse generator 5 controlled by a code whose output is the device output 6, the decoder 7 state, the control input 8 of the device, the element OR 9 and the one-shot 10. New in the device is the use of a generator of 5 pulses controlled by a code, as well as the use of the first binary the second counter 2 as a generator of codes, and the second binary counter as a random access memory, the output code of which is controlled by a low-frequency generator 5. 1 sludge. (L

Description

The invention relates to computing, in particular to pulse forming devices, the duration values of which are random.

The purpose of the invention is the simplification of the generator.

The drawing shows a functional diagram of the generator.

The generator contains a high-frequency generator of 1 pulses, the output of which (connected to the counting input of the binary counter 2, the exposure element 3, the binary counter 4, the low-frequency generator 5 pulses, controlled by a code, the output of which is the output 6 of the device, the decoder 7 single state , control input 8 of the device, OR element 9 and one-shot 10.

The generator operates as follows.

With the power supply, the high-frequency generator 1 begins to generate a continuous sequence of pulses arriving at the counting input of the counter 2, the output of which is also continuously generated parallel binary code supplied to. counter information inputs 4.

The formation of pulses at the output 6 of the device begins from the moment of receipt at the control input 8 of a unit potential supplied to the enable input of the low-frequency generator 5, which begins the formation of a pulse in accordance with the code present at its inputs. On the front of this pulse, passed through the OR element 9, a single-shot 10 is launched, generating a short negative pulse, which through the delay element 3 is fed to the input of the counter 4. In this way, the binary code 4 that is present at the information inputs is recorded in counter 4, and the generator 5 continues to generate a pulse in accordance with the recorded code.

At the end of the pulse, a pause is formed, which is approximately equal in duration to the pulse and is an essential process in the operation of the generator 5, since at this time there is a discharge of capacities involved in the formation of the pulse.

Then, the formation of the next pulse by the generator 5 begins, along the edge of which a single-shot 10 forms a short negative pulse with a delay determined by element 3, which records the code present at the information inputs of the counter 3 at that moment. Further, the process of generating a pulse corresponding to the newly recorded code continues similarly to the previous one.

If in all the digits of the counter 4 it turns out that the unit the largest code that prohibits the generator from operating at the control inputs, then in this case the single state of the counter 4 is decrypted by the decoder 7. According to the positive potential difference at the output of the decoder 7, passed through the OR element 9, a short negative pulse is generated by the one-shot 10. Moreover, the delay value of element 3 is selected more than the pulse repetition period of the generator 1 so that the newly recorded code differs from the one forbidden for the generator 5.

If the numerical capacity of the counter 2 is chosen large enough, then the value of the number recorded in the counter 4 will be all the more uncertain, which means that the duration of the pulse generated at the output 6 of the device will also be indefinite (random).

Claims (1)

Claim A random-duration pulse generator containing a high-frequency pulse generator, the output of which is connected to the counting input of the first binary counter, a delay element, a second binary counter, a low-frequency pulse generator, the output of which is the output of the generator, characterized in that, in order to simplify the generator, a single state decoder, an OR element, and a single-vibrator are introduced, whose inverse output is connected through a delay element to the recording input of the second counter, the information inputs of which о are connected to the discharge outputs of the first counter, the discharge outputs of the second counter are connected to the inputs of the frequency setting of the low-frequency pulse generator and the inputs of the single state decoder, the output of which is connected to the first input of the OR element, the output of which is connected to the input of the one-shot, the second input of the OR element to the output of the low-frequency pulse generator · ₅ , the trigger input of which is the trigger input of the generator.