SU1338019A1 - Random-flow pulse generator - Google Patents

Abstract

The invention can be used in modeling systems and computing. The purpose of the invention is to improve the accuracy of the formation of a uniform law of distribution of time internals formed by the pulse flow. The generator contains R; -trigger 3, elements AND 4 and 5, element OR 8, counters II and 12 pulses. A generator of 2 random pulses, including a noise generator 15 and a threshold element 16, elements AND 6, 7, 13 and 14, and elements OR 9 and 10, are introduced into the device. This allows the characteristics of the flow to be formed to be determined only by the digit of counters 11 and 12 and stability clock speeds. In this case, a change in the wide P1) units of the average pulse frequency of a random sequence of He leads to a distortion of the law of distribution of time intervals between the pulses of the flow being formed. 1 il. (L Fffl L / g -i Sla Od 00

Description

one

The invention relates to a pulse technique and can be used in modeling systems and computing.

The purpose of the invention is to improve the accuracy of forming the uniform distribution law of the time interval of the formed stream of pulses.

The drawing shows a functional diagram of a random pulse flow generator.

The generator of a random stream of pulses contains the bus 1 clock pulses, the generator 2 random pulses, CB-trigger 3, the first D, second 5, third 6 and fourth 7 elements And, the first 8, second 9 and third 10 elements OR, first II and the second 12 pulse counters, 13 and the highest 14 elements I. The bus 1 clock pulses are connected to the first inputs of the AND 4 and 5 elements, the outputs of which are connected to the second inputs of the OR 9, 10 elements, respectively, whose outputs are connected to the counting inputs, respectively counters 11 and 12, the outputs of which are connected respectively One with the second input and the first input of the AND 13 and 14 elements, the outputs of which are connected respectively to the second and first inputs of the OR element, the first and second inputs of which are connected respectively to the S and R inputs of the RS flip-flop 3, direct and inverse whose outputs are connected to the first input and the second input of the AND 13 and 14 elements, respectively, as well as to the second inputs of the AND 4-7 elements, respectively; The generator output 2 of random pulses is connected to the first inputs of the And 6 and 7 elements, whose outputs are connected respectively to first inputs OR 9 and 10.

The random pulse generator 2 comprises a series-connected noise generator 15 and a threshold element 16, for example, a trigger and a mitt.

The generator of a random stream of pulses works as follows.

At the moment when the supply voltage is applied, the RS flip-flop 3 and the triggers of the counters 11 and 12 are set randomly to a single or zero state. Suppose that at the beginning RS-trigger 3 is set to the zero state, and in counters 11 and 12 random binary codes K and Kj are recorded, respectively. First counter

thirty

at

Q

(g, - jg t - -, 35

50

55

40

192.

11produces the counting of pulses of a random sequence, coming from the output of the generator 2 random pulses through the third element And 6 and the second element OR 9. At the same time, the second counter 12 calculates clock pulses from the external generator on the bus 1 clock pulses through the second element

And 5 and the third element OR 10. of how to the input of the second counter

12 2-Kj clock pulses will arrive, an overflow signal appears at its output, which, passing through the sixth element And 14, sets the RS flip-flop 3 to one state

and simultaneously, passing through the first element OR 8, appears at the output of the device. At this point, in the first counter 11 a new random code value is recorded, and in the second counter 12 a code is recorded. Then the first counter I1 counts clock pulses coming through the first element AND 4 and the second element OR 9, and the second counter 12 counts the pulses of a random sequence coming through the fourth element And 7 and the third element SH 10. After the input of the first the counter 11 will receive 2 -K clock pulses, an overflow signal appears at its output, which, passing through the fifth element AND 13, sets the ES flip-flop 3 to the zero state and simultaneously, having passed through the first element OR 8, appears at the exit devices. At this point, the code 11 is recorded in the first counter 11, and 12 in the second counter

new random value recorded

Yes ,. Next, using counters 11 and 12 at the output of the device, random flow pulses are generated in a similar way I

In order to ensure equal values of the duration of the time intervals between the pulses of the generated random flow, it is necessary that during the time during which one of the counters counts the clock pulses, the other counter repeatedly overflows, so the CK guarantees the same value of the random code K (K) remaining in the counter, at the moment of switching the RS flip-flop 3. For this, the average frequency f. following impulses

the tea sequence from output 1 of the timer 2 random pulses is selected from the ratio

 f-1 - f

- t ti

where M is 5-10;

, - frequency of impulses on the bus

clock pulses. Random values of the duration of the time intervals between pulse 2 -K

--- paradise TI

av - to

 TI

mi output stream

numbered from

, eleven- . f

The number of equal values of T ,. equals 7.,

The mathematical expectation of the duration of the time intervals between the pulses of the output random flow is determined by the expression

0 G-

Ty

Thus, the characteristics of the flow being formed are determined only by the size of the counters K and the frequency stability of clock pulses. In this case, a change in the average frequency f of the random sequence pulses does not distort the law of the distribution of time intervals between the pulses of the flow being formed.

Claims (1)

Invention Formula A random pulse generator containing a clock pulse bus connected to the first inputs of the first and second elements AND, Editor's Note: Kishtulinets Zakae 4143/54 Compiled by U. Burmistrov Tehred M. Didyk Corrector Circulation 901 Subscription VNIKLI USSR State Committee on divide inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 The first and second counters, CG) -trigger, direct and inverse outputs of the copeder are connected to the second inputs of the first and second elements AND, the first OR element, respectively, characterized in that, in order to improve the accuracy of forming the uniform distribution of time intervals of the generated flow of pulses, the third, fourth, fifth and sixth elements AND, the second and third elements OR, a random pulse generator, whose output 5 is connected to the first input of the third element AND and the first input of the fourth element AND, the output of which is connected to the first input of the third element OR, the output of which is connected to the counting input of the second counter, the output of which is connected to the first input of the sixth element And whose output is connected to the first input the first OR element and the RS trigger input, the direct output of which is connected to the first input of the fifth AND element, the output of which is connected to the second input of the first OR element and the R input of the RS flip-flop, the inverse output of which is connected to the second th input of the sixth element And the second input of the third element And, the output of which is connected to the first input of the second element OR, the output of which is connected to the counting input of the first counter, the output of which is connected to the second input of the fifth element And, the second input of the second element OR connected to the output the first element And, the second input of which is connected to the second input of the fourth element And, the output of the second element And is connected to the second input of the third element OR. 0 five 0 Proofreader M.Sharoshi