SU1739489A1 - Generator of poisson flux of pulses - Google Patents

Abstract

It is used in the pulse technique to produce pulse streams with different distributions. The generator of the Poisson pulse stream contains sensors 1, 7 random numbers, digital-to-analog converters 2, 9. blocks 3,10,13 comparisons, chopper 4, drivers 5, 11 pulses, keys 6 and 15, block 8 multiplications, generators 12 and 20 exponential voltage, element 14, pulse counter 16, shift register 17, filter 18, memory block 19, delay element 21. 1 il.

Description

The invention relates to a pulse technique and is an improvement of the generator according to ed. St. No. 1667229.

The purpose of the invention is the expansion of functionality by increasing the number of laws of distribution of the generated pulse flows.

The drawing shows an electrical block diagram of a Poisson pulse flow generator. 10

The Poisson pulse stream generator comprises in series a first random number sensor 1, a first digital-to-analog converter 2, a first comparison unit 3, a chopper 4, 15 a first pulse shaper 5, a first key 6, a second random number sensor 7, a multiplication unit 8, a second digital-to-analog converter 9 , the second comparison unit 10, the second pulse generator 11- 20 pulses, the second exponential voltage generator 12, the third comparison unit 13, the element NOT 14, the second key 15, pulse counter 16, shift register 17, filter 1 8 and a memory unit 19, a first exponential voltage generator 20, a delay element 21, the input of which is connected to the second input of the shift register 17 and to the output of the second pulse shaper 11. The output of the delay element 21 is connected 30 to the second input of the pulse counter 16. The output of the first pulse shaper 5 is connected to the input of the first random number sensor 1, to the second input of the second key 15 and to the input of the first exponential voltage generator 20 35, the output of which is connected to the second input of the first block 3, the output of the third comparison block 13 is connected to the second input the first key 6, the output of which is connected to the 40 second input of the second exponential voltage generator 12, the output of which is connected to the second input of the second comparison unit 10. The output of the memory unit 19 is connected to the input of the multiplication unit 8. 45

The Poisson pulse flow generator operates as follows.

When the device is turned on using a chopper 4, the first pulse generator 5 of 50 pulses gives a pulse to the input of the first random number sensor 1 and to the start input of the first exponential voltage generator 20. The random number sensor 1 generates possible values of a random 55th number with a uniform distribution in the interval (0, 1) in digital form, which are converted into an analog value using the first digital-to-analog converter 2. At the same time, the first exponential voltage generator 20 generates an exponentially increasing voltage. When the signal of the first generator 20 exceeds the exponential voltage of the signal generated at the output of the first digital-to-analog converter 2, a signal with a logic level of 1 is generated at the output of the first comparison unit 3, which, passing through the chopper 4, is converted into an impulse by the first pulse shaper 5. The described processes are repeated, therefore, at the output of the first pulse shaper 5, a random pulse stream is formed, the intervals between which obey an exponential distribution with parameters determined by the characteristics of the first exponential voltage generator 20. The pulses of this stream through the first switch 6 are fed to the input of the second probe 7 random numbers and to the start input of the second exponential voltage generator 12.

When the signal from the output of the second generator 12 of the exponential signal voltage from the output of the second digital-to-analog converter 9 at the output of the second comparison unit 10, the signal from the logic zero level goes to the level of the logical unit, which is converted into a pulse by the second pulse shaper 11. This pulse resets and stops the second exponential voltage generator 12, and also enters the output of the Poisson pulse stream generator.

In the interval between the reset and start signals of the second exponential voltage generator 12, a logic zero level is generated at the output of the third comparison unit 13, which prevents the pulses from passing through the first key 6 and opens the second key 15 for these pulses.

Thus, pulses are accumulated in the pulse counter 16, which are recorded by the pulse of the second pulse shaper 11 in the shift register 17 with the shift of the previous information. After delaying this pulse in the delay element 21, the pulse counter 16 is reset to zero. In the filter 18, the information of the shift register 17 is averaged. This averaged number p _C p enters the memory block, which is made in the form of ROM and can be programmed to any function.

For example, with an average number n _С p = О, the unit code is generated at the output of the memory unit 19, at 0 <n _С p <1, the code is 0.9, and for 1 <n _С p ^ 2, the code is 0.8, etc. . The code of the memory unit 19 is fed to the input of the multiplication unit 8, decreasing in magnitude the output signal of the second random number sensor 7, which leads to an increase in the frequency of occurrence of pulses at the output of the second pulse shaper 11.

Thus, the class of pulsed fluxes formed at the output of the Poisson pulse flux generator significantly expands.

Claims (1)

Claim Generator of a Poisson pulse flow according to ed. St. No. 1667229, characterized in that, in order to expand the functionality by increasing the number of distribution laws of the generated pulse flows, a second key, a pulse counter, a shift register, a filter, a memory block and a multiplication block, a delay element, an element are additionally introduced into it NOT, the output of which is connected to the first input of the second key, the second input of which is connected to the output of the first pulse shaper, the output of the second pulse shaper is connected to the second input of the shift register and to Odom delay element whose output is connected to a second input of the pulse counter, the third comparator output is connected to the input of NOT circuit outputs a second random number generator connected to a group of inputs the multiplication unit, outputs of which are connected to the inputs of the second digital to analog converter.