SU1297044A1 - Random time interval generator - Google Patents

Abstract

The invention relates to the field of computing and can be used in statistical studies. The purpose of the invention is to improve the accuracy of the generator. The generator contains bus 1 input sequence, trigger 2, bus 3 specifying source data, bus 4 in turn sequence, generators 5, 6, 7 pulses, counter 8, trigger 9, memory register 10, delay element 11, driver 12 and co-drivers , the input data bus 13, the elements 14-18 and the comparison circuit 19, the pulse shaper 20, the ШШ 21 element, the output sequence bus 22, the trigger 23, count 24, the comparison circuit 25. The generator performs the formation of random time intervals with a regular sequence of input pulses, determining the regularity of the input sequence by adding a predetermined number of pulses of the output sequence of a constant duration. 1 il. I (L

Description

The invention relates to computing and can be used to simulate random, uniform processes, for example, in the study of reliability, noise immunity of systems, and also as a specialized unit of computers. .

The purpose of the invention is to increase the accuracy of the generator by maintaining the randomness of the time intervals being formed with a regular input sequence of trigger pulses.

The drawing shows a block diagram of a random time interval generator.

The random time interval generator contains a bus 1 of the input sequence, a trigger 2 "bus 3 sets the initial data for an additional time interval, bus 4 of the output sequence, a generator of 5 high-frequency pulses, a generator of 6 intermediate frequency pulses, a generator of 7 low-frequency pulses, the counter 8, the trigger 9, the memory register 10, the element 11 for the cert, the pulse former 12, the input data bus 13, the elements 14-18 AND, the comparison circuit 19, the pulse former 20, the element 21 OR, the output sequence bus 22 sequence, trigger 23, counter 24, comparison circuit 25.

The proposed device works as follows.

In the initial state, the triggers 2, 9 and 23 are in the single state, the pulses from the output of the generator 5

Sh

15

The sensor 8 is fed to the input of the pulse driver 12 and through the element 15 I enters the input of the zero setting of the trigger 23 and the input of the preliminary record of the counter 8. The trigger 23 is set to the zero state, prohibiting the passage of the positive potential through the element 18 I, forming a drop on the output bus 22, and counter 8 records the code from the input bus 3. Counter 8 continues counting the pulses from the output of the low-frequency generator 7 until the next overflow. The overflow signal through element 16A enters the installation inputs of the unit of flip-flops 2 and 23. Thus, at the output buses 4 and 22 (Output 2 and Output 1, respectively), time intervals are formed, the duration of which Tg and T are random, since The state of the counter at the time of arrival of the triggering pulse is uniformly distributed.

If the sequence of triggering pulses becomes deterministic with a constant interval between them, then among the whole set of possible time intervals there is necessarily such that after it is formed, the position of the counter 8 at the moment of arrival of the triggering pulse is exactly the same as at the moment of arrival the momentum of the one before. In this case, the codes at the outputs of the counter 8 and the register 10 will coincide, the comparison circuit 19 generates the enable signal and from the output of the driver 20 and 20

25

thirty

the high frequency is received through the pulse 40 through the element 17 and the ment 21 arrives OR at the counting input of the counting counter of the counter 24, and of the receipt 8. When the cut-off trigger starts the delay element 11, the pulse arrives at the miiHy 1 trigger 2 set recording input register 10 is fixed to the zero state. On the output of the counter 8 at the time of the incoming tires 4 and 22, a trigger pulse signal is generated. Counter

cash logical 1 (the leading edge of the formed time interval). A single signal from the zero output of trigger 2 starts the generator of 7 low-frequency pulses, and a zero signal from ignored from the single output of trigger 2 prohibits the operation of the generator of 5 high-frequency pulses. The pulses from the output of the low-frequency generator 7 through the element 21 OR are fed to the counting input of the counter B and are counted by it until the overflow signal appears. Signal overflow signal

five

The sensor 8 is fed to the input of the pulse driver 12 and through the element 15 and enters the input of the zero setting of the trigger 23 and the pre-recording input of the counter 8. The trigger 23 is set to the zero state, prohibiting the positive potential from passing through the element 18 And forming a drop on the output bus 22, and the counter 8 records the code from the input bus 3. The counter 8 continues counting the pulses from the output of the low-frequency generator 7 until the next overflow. The overflow signal through element 16A enters the installation inputs of the unit of flip-flops 2 and 23. Thus, at the output buses 4 and 22 (Output 2 and Output 1, respectively), time intervals are formed, the duration of which Tg and T are random, since The state of the counter at the time of arrival of the triggering pulse is uniformly distributed.

If the sequence of triggering pulses becomes deterministic with a constant interval between them, then among the whole set of possible time intervals there is necessarily such that after it is formed, the position of the counter 8 at the moment of arrival of the triggering pulse is exactly the same as at the moment of arrival of the triggering the momentum of the one before. In this case, the codes at the outputs of the counter 8 and the register 10 will coincide, the comparison circuit 19 generates the enable signal and from the output of the driver 20 and 0

five

0

24 counts the number of pulses of the same duration and when forming m such pulses (the value of m is given by a code on the input bus 13),

50, the comparison circuit 25 generates a pulse that flips the counter 24 and sets the trigger 9 to the zero state, permitting the passage of the pulses from the intermediate frequency generator 6

55 through element 14, element 21 OR at the input of counter 8. An additional number of pulses changes the state of counter 8 by the time of arrival

triggering pulse, as a result of which the device forms intervals on the output tires that are different from the previous ones.

Claims (1)

Invention Formula A random time interval generator containing the first trigger, the zero input of which is the generator start input, the single output of the first trigger is connected to the input of the high frequency pulse generator, the output of which is connected to the first input of the element OR, the output of which is connected to the summing input of the first counter, the overflow output of which through the first pulse shaper is connected to the first inputs of the first and second elements I, the outputs of which are connected respectively to the single and zero inputs second trigger, single and zero outputs of which are connected to the second inputs of the second and first elements AND, the third inputs of which are combined, respectively, connected to the first input of the third And element and connected to the zero output of the first trigger, the second input of which is connected to the single output of the second trigger, and the output of the third element AND is the output of the first stream of random time intervals of the generator, the output of the second stream of random time intervals of which is the zero output of the first trigger, connected Start with the input of the low frequency pulse output of which is ,, connected to the second input of the OR gate, the output of the first AND element is connected to a single input of the first flip-flop, a t-lichayuschiys in that, in order to increase the accuracy of the generator Editor L.Povkhan Order 782/52 Compiled by A.Karasov Tehred M. Khodanich. Proofreader A.T. sko Circulation 673 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, 4. by preserving the randomness of the time intervals being formed with a regular input sequence of triggering pulses, it contains a memory register, two comparison circuits, a second pulse shaper, a delay element, a second counter, two AND elements, a third trigger, and an intermediate frequency generator, whose code is connected with the first input of the fourth element AND, the output of which is connected to the third input of the OR element, the output of the first element AND is connected to the single input of the third trigger, the zero output of which dinene with the second input of the fourth element And, the output of the second element And is connected to the synchronizing input of the first counter, the installation input of which is the input of setting the parameters of the generator time intervals, the input of the correction of the time intervals being formed is the first the input of the first comparison circuit, the output of which is connected to the zero input of the third trigger and the input Reset; the second counter, the output of which is connected to the second input of the first circuit comparison, the zero output of the first trigger through the second pulse shaper is connected to the first input of the fifth element And and to the input of the delay element, the output of which is connected with the synchronization input of the register, the memory, the output of which is connected to the first input of the second comparison circuit, the output of which is connected to the second input of the fifth AND element, the output of which is connected to the counting input of the second counter, the output of the first counter is connected to the information input of the memory register and the second input of the second circuit compare.