SU1529219A1 - Random pulse generator - Google Patents

Abstract

The invention relates to computing and can be used in simulating queuing systems to simulate a flow of applications with different characteristics in terms of priority and required service time, as well as in the construction of automated test complexes. The purpose of the invention is to expand the functionality by changing the pulse amplitude according to a given law. The generator contains the first 1 and second 6 sensors of random codes, the first 2 and second 7 registors, the first 3 and second 8 memory blocks, the 4 clock pulse generator, the counter 5, the digital-to-analog converter 9, the delay element 10. Codes according to the law of probability distribution of occurrence of different time intervals between pulses are loaded into the first memory block 3, and codes are loaded into the second memory block 8 according to the law of probability distribution of occurrence in a stream of pulses with different amplitudes. When the generator is operating, a sample is taken from these memory blocks at a random uniform distributed address and a random stream of pulses with given time and amplitude characteristics is formed. 1 il.

Description

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The invention relates to computing and can be used in simulating queuing systems to simulate a flow of applications with different characteristics in terms of priority and required service time, as well as in building automated test complexes.

The aim of the invention is to enhance the functionality by changing the software to a given law of pulse amplitude.

The drawing shows the functional diagram of the device.

The random pulse generator contains the first sensor 1 random codes, the first register 2, the first memory block 3, the 4 clock pulse generator, counter 5, the second sensor 6 random codes, the second register 7, the second memory block 8, digital-to-analog converter 9, element 10 delay.

The generator works as follows. Before the beginning of operation, the first block of memory records codes corresponding to the time intervals between the pulses. The number of cells into which each of these codes is written corresponds to the probability of the appearance at the output of the first memory block of individual codes when the memory block nq is addressed to a random uniformly distributed law from the first random code sensor. The next code from the output of the first memory block is written into the subtracting counter, which forms the next overflow pulse in time proportional to the value of this code.

In the second block of memory, before starting work, codes corresponding to the amplitudes of the pulses are recorded. The number of cells into which each of these codes is written corresponds to the probability of the appearance at the output of the second memory block of individual codes when accessing the memory block according to a random uniformly distributed law from the second random code sensor. The next code from the output of the second memory unit is fed to the data input of the analog-digital converter. When a converter appears at the resolution input, a next pulse at its output, which is the generator output, there appear pulses, the time interval between which and the amplitude of which obey the given probability distribution laws.

The number of cells t, -, in which each of the random codes K / is recorded, is proportional to the probability of the occurrence of this code P, with a single access to the memory block by a random uniformly distributed address code. If bit d0

0

the address input of the memory block K, then t, - (2 -) P ,.

In the first memory block 3, random codes are recorded in accordance with the law of probability distribution of occurrence of certain intervals between pulses in the generator output stream, and in the second memory block 8 random codes are recorded in accordance with the law of probability distribution of appearance of different pulse amplitudes in output flow controlled by the generator.

At the moment when an overflow pulse appears at the output of counter 5, it enters the conversion enable input

5 digital-to-analog converter 9. The pulse amplitude at the output of this converter is determined by the code on, the data input, which comes from the output of the second memory block 8. The code value at the output of memory block 8 is determined by the code at its address input, which comes from the output of the second register 7. The overflow pulse from the output of the counter 5 pulses with a delay in the delay element 10 is fed to the input “Poll of the second sensor 6

5 random codes and this sensor gives the next random code. The occurrence of a pulse at the input of the second register record 7 ensures that 6 random codes from the second sensor are recorded in this register. So every

0 a regular pulse from the overflow output of counter 5 provides a sample of randomly distributed address codes from the second memory block 8 and, therefore, the formation of pulses at the output of the digital-to-analog conversion of 6 bodies 9 with a given law of probability distribution of amplitudes.

The pulse from the output of the counter 5 pulses writes the following random code from the first sensor 1 into the first register 2

0 random codes and with a delay in the delay element 10 the code K is entered into the counter of 5 pulses, - from the output of the first memory block 3, which is read at the address corresponding to the code value at the output of the first register 2. Generator5 pulses of 4 pulses are sent to the subtracting the input of the counter 5, as a result, after a time m, 1, depending on the random code K, - generated at the output of the first memory block 3, and the frequency of the pulse generator 4, at the output of the counter 5

0 the next overflow pulse appears, according to which the following code is written in the first register 2 addresses, etc. The time interval between the overflow pulses of the counter 5 pulses is random and has a probability distribution law identical to the probability distribution of the codes K ,. Loading accordingly in the first block 3 of memory

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and the second block 8 of memory and control codes and with the register entry input, distinct codes, can be formed at the output, which is obtained by the fact that, in order to expand the rator, pulse streams with the required functionality by means of probabilistic properties - changes according to a given law of amplitude of variable intervals between pulses and the value of g pulses, the second sensor of their amplitudes. random codes, the second register, the second

a memory unit, a digital-to-analog converter and a delay element, the output being

Claims (1)

The inventive overflow formula is connected to the inlet a delay element and a random pulse generator input, containing a digital-to-analog converter, a random code sensor, a register, a count — the output of the delay element is connected to an input, a clock generator, and a meter installation unit, with a memory input, the output of the sensor of the random ci of the second register and with the input “Poll - codes is connected to the information input of the second sensor of random codes, the output of the coding register, the bit outputs of which are connected to the information input with the address input memory location, home of the second register, the output of which is connected to the information output is connected to the address input of the second counter input counter, the counting input of which memory, the output of which is connected to the input connected to the output of the clock generation input of the digital-analogue pulses, overflow output a co-converter counter, the output of which is dinene with the sensor polling input of random 20 information generator output.