SU947948A1 - Random flow sensor - Google Patents

Description

The invention relates to a technique for generating random signals and can be used in computational and modeling systems for statistical tests.

A random signal generator, comprising a threshold element / noise generator, a filter, a detector, a sinusoid voltage generator, an amplifier and a pulse shaper 1, is known.

The disadvantage of the device is its complexity.

The closest to the present invention is a random flow sensor comprising a random number generator, a register and a comparison unit on AND and OR 2 elements.

A disadvantage of the known device is the impossibility of obtaining a random stream with a uniform distribution of intervals.

The purpose of the invention is to increase the uniformity of the random flow intervals.

This goal is achieved by the fact that the T1rigger control, the first and second counters, and the first and second keys are entered into the random flow sensor containing the elements AND and OR,

the inputs of which are connected to the power bus, and the outputs of the keys are connected respectively to the power buses of the first and second counters, the counting inputs of which are connected respectively to the outputs of the first and second I elements, the first inputs of which are connected to the clock pulse bus, the output of the first counter is connected to a single input the control trigger and with the first input of the OR element, the output of the second counter — with the zero input of the control trigger; and with the second input of the OR element, the single output of the control trigger connected to the controller in the second key and the second input of the second element AND, the zero output of the control trigger is connected to the control input of the first key and to the second input of the first element AND, the output of the OR element is connected to the output bus of the device.

The drawing shows a functional diagram of the sensor random

25 flow.

The device contains a trigger 1 control, the element OR 2, the first and second keys 3 and 4, the first and second elements And 5 and b, the first and second

30 counters 7 and 8, 9-clock bus, power bus 10, output. bus 11.

Bus 9 clock pulses connected to the inputs of the elements And 5 and b, and the power bus 10 - to the inputs of keys 3 and 4. The output of the element And 5 is connected to the counting input of the counter 7, the output of the element And 6 - to the counting input of the counter 8, the power bus of the counter 7 is connected to the output of the key 3, and the power supply of the counter 8 is connected to the output of the key 4. The output of the counter 7 is connected to the single input of the control trigger 1 and the first input of the OR element 2, the output of the counter 8 to the zero input of the control trigger 1 and the second input of the OR element 2, a single control trigger output 1 is connected to the control at the input of the key 3, the zero output of the control trigger 1 is to the control input of the key 4, the output of the OR 2 element is connected to the output bus 11 of the device. The first inputs of the elements And 5 and 6 are connected respectively to the zero and single outputs of the trigger 1 control.

The device works as follows.

In the initial state O of the trigger 1 control key 4 and the element And b are closed, and key 3 and the element And 5 are open. The voltage from the bus 10 through the key 3 is fed to the bus power meter 7, resulting in its triggers spontaneously installed

ABOUT

or

are in the state

and in counter 7 a random binary number is fixed.

When a clock pulse arrives from the screen 9 to the second input of the element 5, the counter 7 begins to fill up, when the output pulse overflows to the first input of the element .OR 2 and then to the output bus 11 of the device and simultaneously to the single input of the control trigger 1 which is set to 1

In this case, the key 3 is closed, removing power from the counter 7, and the flow of clock pulses through the element 5 is stopped. At the same time, the key 4 opens, applying voltage to the power supply bus of the counter 8, which triggers spontaneously set to state or O, resulting in counter 8 is fixed to some random binary number. The clock pulses from the bus 9 through the element 6 are fed to the counting input of the counter 8. The overflow pulse of the counter 8 is fed to the second input of the element OR 2 and further to the output bus 11 of the device, a. also simultaneously to the zero input of the trigger 1 control, setting it to the state O. In this case, the key 4 is closed, removing power from

counter 8, and the arrival of pulses, through element b, is terminated.

Further, the sensor operation cycle repeats as described.

The technical and economic efficiency of the proposed sai device lies in the uniformity of the distribution of the random flow intervals.

The sensor is characterized by the following relationships:

discreteness of time intervals in the stream

IH-III-0-N

,

where TC is the period of clock pulses; , T - the maximum time interval in the stream; N is the counter size; and the current value of the time intervals in stream N

T.x (2 - X, -) Tj, where X.J is a random number recorded when the counter is turned on in the i-OM.formation cycle. Since is a uniformly distributed random quantity, the proposed random flow sensor is also a uniformly distributed random quantity.

Claims (2)

1. Author's certificate of the USSR W 647858, cl. H 03 K 3/84, .1977. 2. Bobnev M.P. Generating random signals. M., Energie, 1971, p. 177-182, fig. 7-1 (prototype / 7