SU1674117A1 - Random process generator - Google Patents

Abstract

The invention relates to computational and impulse techniques and can be used to form random time intervals, the duration of which is distributed according to various probability laws. The purpose of the invention is to expand the functionality by forming random time intervals distributed according to a given probability law. The generator contains triggers 1, 8, elements AND 4, 7, 9, 10, element OR 3, low-frequency generator 2 pulses, counter 5, driver 6 pulses, multivibrator 14, delay element 15, switch 12, decoder 11 and duration setting unit 13 pulses. 2 Il.

Description

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The invention relates to computing and impulse technology, in particular, to devices for forming random time intervals, the duration of which is distributed according to various probabilistic laws.

The purpose of the invention is to expand the functionality of the generator by forming random time intervals distributed according to a given probability law.

FIG. 1 shows a functional diagram of the generator; in fig. 2 - time diagrams illustrating his work.

The random process generator contains the trigger 1, the low-frequency generator 2 pulses, the element OR 3, the element And l, the counter 5, the pulse shaper 6, the element And 7, the trigger 8, the elements And 9, 10, the decoder 11, the switch 12, the block 13 setting the duration impulses, made in the form of a resistance block, waiting for multivibrator 14, delay element 15, the generator start input being the zero input of trigger 1, the zero output of which is connected to the input of the low-frequency pulse generator 2 and to the first input of element 4, as well as to the first inputs ale And 7, 9, the second inputs of which are interconnected and connected to the output of the pulse shaper 6, the zero input of the trigger 8 is connected to the third input of the And 7 element, the third input of the And 9 element is connected to the second input of the And 4 element and the single output of the trigger 8. the single input of which is connected to the output of the element AND 7 and the single input of the trigger 1, the output of the low-frequency pulse generator 2 is connected to the second input of the element OR 3, the output of which is connected to the clock input of the counter 5, the overflow output of which is connected to the input PULTS 6, the output of the element And 9 is connected to the zero input of the trigger 8, the output of the element 4 is the generator output, the inputs of the decoder 11 are connected to the corresponding information outputs of the counter 5, the outputs of the decoder 11 are connected to the information inputs of the switch 12, the control inputs of which are connected to the outputs of block 13, the output of the switch 12 is connected to the control input of the waiting multivibrator 14. its output is connected to the second input of the element 10 and the input of the delay element 15 whose output is connected to the input of the start waiting first multivibrator 14, the first input of the AND element 10 is connected to the trigger output unit 1, and an output - to the first input of OR 3.

The generator works as follows.

In the initial state of the generator, the triggers 1, 8 are in the single state,

element 10 is open at the first input, pulses from the output of the standby multivibrator 14 through the element OR 3 arrive at the input of the counter 5. When the next pulse arrives at the clock input, the counter 5 changes

its state, the decoder 11 switches the information input of the switch 12, which connects another resistance to the control input of the standby multivibrator 14. When switching resistance at the control input of the standby multivibrator 14, it produces a pulse of a different duration determined by the value of the connected resistance (see diagrams on Fig. 2). Delay element 15

designed to start the standby multivibrator 14 when the power is turned on, as well as to restart the standby multivibrator at a time interval mn after the end of the next generated pulse. The magnitude of the rp is determined by the total delay time in the counter 5, the decoder 11, the switch 12. Thus, before the trigger pulse arrives, the counter 5 is controlled by pulses from the output

waiting multivibrator, the duration of which may be different for each of the states of the counter 5. This allows you to set different probabilities of the counter in one of its states at the moment of arrival of the trigger pulse. After the start-up pulse arrives at the input. The start of the generator, trigger 1, is set to the zero state, in which the element 10 closes at the first input. The low frequency pulse generator is turned on and the pulses from its output through the element OR 3 arrive at the clock input of the counter 5 and are counted last until the overflow. Overflow pulse

the counter 5 through the pulse shaper 6 and the AND 9 element is fed to the R input of the trigger 8, transferring it to the zero state. Counter 5 continues to count the pulses from the output of the low-frequency pulse generator 2 and the next overflow pulse through the pulse shaper 6 and the And 7 element enters the S-inputs of both triggers, putting them into one state. From this point on, counter 5 counts the pulses from the output of the waiting multivibrator until the next trigger pulse arrives.

In order to ensure the formation of random time intervals, the distribution law of which corresponds to the specified ratios of the durations of the pulses of the waiting multivibrator, it is necessary to choose the period of the triggering pulses that provides repeated overflow of the counter 5.

Claims (1)

Claims A random process generator comprising a low-frequency pulse generator, three AND elements, a pulse shaper, an OR element, two triggers and a counter, the overflow output of which is connected to the first inputs of the first and second elements AND, the output of which is connected to the first R input trigger, the inverse output of which is connected to the second input of the first element I, the output of which is connected to the S inputs of the second and first triggers, the direct output of which is connected to the second input of the second el And with the first input of the third element And, the output of which is the generator output, the start input of which is the R input of the second trigger, the inverse output of which is connected to the second input of the third element And, with the third inputs of the first and second elements And through a low-frequency pulse generator - with the first input of the OR element, the output of which is connected to the clock input of the counter, characterized in that, in order to extend the functionality by forming random time intervals distributed over Additions to the probabilistic law, a fourth AND element, a multivibrator, a decoder, a delay element, a switch, and a pulse width setting unit, whose outputs are connected to the information inputs of the switch, whose output is connected to the information input of the multivibrator, whose output is connected to the first input of the fourth element And through the delay element - with the start input of the multivibrator, the direct output of the second trigger is connected to the second input of the fourth element I, the output of which is connected to the second input element OR, the counter outputs are connected to the inputs of the decoder, the outputs of which are connected to the control inputs of the switch.