SU1401458A1 - Generator of random pulse train - Google Patents

Abstract

The invention relates to computing and can be used to generate pulse sequences with a very short tracking period. The device provides a change in the form of the law of the distribution of the values of time intervals between pulses. The purpose of the invention is to increase the reliability and enhance the functionality by providing the possibility of changing the type of the distribution law and adjusting the time intervals to be formed. In the device, random values are formed on the basis of counting by a reversing counter P, into which a code is preliminarily entered, of pulses of a random stream generated by series-connected noise generator 1 and threshold element 3, arriving at equal time intervals first to the summing and then to the subtracting inputs of the reversible counter 11. Upon completion of the strobe, a random number is recorded in counter 11, depending on the difference in the number of pulses counted during the strobe. Then, the counter 11 counts the clock pulses from the output of the generator 7 to overflow. The overflow signal of the counter 11 enters the output bus and through the BAN 10 element and the delay element 2 enters the code into the counter 11; the device is switched to a random flow pulse counting mode. The increase in the reliability of the device is achieved by blocking the element BANCH 10 by a signal from the output of the element OR 8 for the period of existence of gates 2 Il. / 3 Q S С /; with

Description

The invention relates to computing and can be used to generate pulse sequences with a random following period.

The purpose of the invention is to increase the reliability and enhance the functionality by providing the possibility of changing the type of distribution law.

dividing the formed time intervals.

Figure 1 shows a structural electrical circuit of a random pulse sequence generator; figure 2 - timing charts of his work.

The random pulse generator contains a noise generator 1, a delay element 2, a threshold element 3, a block of drivers for 4 pulses, two elements AND 5 and 6, a generator of 7 clock pulses, two elements OR 8 and 9, a element BAN 10, a reversible counter 11 , output 12 of the source code and output 13.

The generator of a random pulse sequence works as follows.

At the moment the power is supplied, the bit triggers of the reversible counter 11 are set randomly, while a random code is written in the reversing counter 11. The clock pulses from the generator output 7 clock pulses (FIG. 2a) are fed through the OR 9 element to the sum input. counter 11 (FIG. 2 e), which counts these pulses up to the moment of overflow. The overflow signal of the reversible counter 11 (Fig. 2c) is fed through the element BAN 10 to the output 13 of the device. The signal from the output of the element BAN 10 is fed to the input of the initial installation of the reversible counter 11, by writing into it the code previously submitted to the output 12; and, in addition, this signal, delayed by delay element 2, is fed to the input of the driver .4 pulses V at the first output of which the first gate is formed (Fig. 2d). At the moment when the first strobe is completed, the second strobe begins to form at the second output of the pulse shaper 4 (Fig. 2e). The pulses of a random stream (FIG. 26) produced by series-connected noise generator 1 and threshold element 3, post0

ABOUT

,

5 0 5 0

during the first gate, they go through the first element I 5 and the element IPI 9 to the summing input of the reversing counter 11 (Fig. 2e) and summed up with the code written in it. Then, the random flow pulses are received during the second gate through the second element 6 and to the subtraction of the input of the reversing counter 11 (Fig. 2g) and are subtracted from the number obtained by the start of the second gate.

If during the gates the reversible counter 11 overflows, then the overflow signal does not pass through the element BAN 10, blocked by the signal arriving at the second inverse input of this element from the output of the left element OR 8

After the completion of the second gate, the element BAN 10 is unlocked. The clock pulses continue to flow to the summing input, the reversing counter 11 until it overflows. The magnitude of the time interval between the pulses at the output 13 depends on the remainder in the reversing counter 11.

Since the difference in the number of pulses counted by the reversible counter 11 during both gates is random, the magnitude of the remainder is also random.

Due to the fact that a random time interval is formed on a digital basis, it is a discrete random variable (the discrete value is equal to the period of the clock

series). I

In order to ensure the accuracy of generating the output signals, determined by the stability of the characteristics of the law of distribution of time intervals, it is necessary that the formation of a random residue in the reversing counter 11 be completed during one clock pulse following period.

Claims (1)

Invention Formula A random pulse generator containing a noise generator, the output of which is connected to the input of the threshold element, the output of which is connected to the first inputs of the first and second elements AND, the second inputs of which are connected respectively to the first and second outputs of the unit of the shaping pulses And connected to the first input of the first element OR, the second the input of which is connected to the output of the clock pulse generator, the output of the first element OR is connected to the summing input of a reversible counter, the subtractive input of which is connected to the output of the second element AND, which is designed to expand the functionality of the generator providing the possibility of changing the form of the distribution law of the formed time intervals, it contains the BAN, the second OR element and the delay element, the output of which is connected to the input Imgulus driver unit, the first and second outputs of which are connected respectively to the first and second inputs of the second OR element, the output of which is connected to the inverse input of the BAN, the output of which is the generator output and connected to the input of the element and the synchronizing input of the reversible counter, the installation input which is connected to the output of the source code, and the output of the reversible counter is connected to the direct input of the element BAN. and m