SU834851A2 - Random pulse train generator - Google Patents

Description

(54) GENERATOR OF A RANDOM FLOW OF PULSES

I

The invention relates to a pulse technique and can be used as a device for checking the dynamic characteristics of dispersion meters and the average value of the intervals between two adjacent pulses, in particular the time meters of the cardio signal.

According to the main author. St. No. 736362 is known a random pulse generator, comprising a Poisson generator, a controlled frequency divider, a control unit, a reference frequency generator, a switch unit, a driver of the output pulse duration 1.

The disadvantage of the known generator is the impossibility of generating a random pulsed stream with moments independently varying in time according to a given law, which does not allow checking the dynamic characteristics of the dispersion meters and the average value of time intervals.

The purpose of the invention is to extend the functionality by independently adjusting the moments of the generated pulse signal.

The goal is achieved by the fact that a random pulse flow generator containing a controlled generator of a Poisson pulse flow, the output of which is connected to the input of a controlled frequency divider, the control inputs of which are connected to the corresponding outputs of the switch block, is a driver of the duration of the output pulses, which input is connected to the output of the controlled frequency divider, a frequency comparison unit, the inputs of which are connected to another output of the controlled frequency divider and the output of the reference generator second signal respectively, and the output of the comparator via a control unit connected to the control input of the controllable oscillator Poisson pulse stream generator administered predetermined time function and squarer, whose output is connected to one of the inputs

Claims (1)

j of the switch block, the quad input is connected to the generator output of a given time function, to another input of the switch block and to one of the inputs of the controlled frequency divider. The drawing shows a structural electrical circuit of the proposed generator. The random pulse flow generator contains a controlled Poisson pulse flow generator 1, a controlled frequency divider 2, an output pulse width generator 3, a switch block 4, a control block 5, a reference signal generator 6, a frequency comparison block 7, a predetermined function generator 8 , quad 9, the output bus -10. In the drawing and in the description, the operation of the device is considered one of the examples of the execution of the switch block, in this case the operation of the generator with a controlled key on two positions is considered. The device works as follows. The pulse from the output of generator 1 is fed to the input of a controlled divider 2 frequency, which has two outputs, the division factor for each of which is proportional to the magnitude of the w-signal applied to the control inputs of the controlled frequency divider. The pulse stream from the first output of the splitter 2 is fed to the shaper 3 of the output pulses in duration and then goes to the output bar 10 of the generator. The pulse stream from the second output of the splitter 2 frequency is fed to one of the inputs of the frequency comparison unit 7, to the other input of which a periodic stream of pulses of the reference generator 6 of a stable frequency fo is fed. The output signal of the frequency comparison unit 7 acts on the input of the control unit 5, which controls the intensity of the Poisson pulse at the output of the generator 1. The output signal of the generator 8 of a given time function is fed to the control input of the controlled frequency divider 2 and quadrant 9, as well as one of block inputs 4 switches. The output signal of the quadrant 9 is fed to another input of the block 4 switches. Using the key in two positions, both inputs of the divider 2 receive a signal proportional to M-lt) and V (t). The generator blocks 2, 5, 6 and 7 form a negative feedback circuit of the system for automatically controlling the intensity of the pulse flow of the controlled generator 1. The system ensures the equality of the intensity of the pulse signal from the second output of divider 2 and the frequency of the reference generator 6 at the inputs of frequency comparison unit 7 . Thus, the intensity of the Poisson flow of pulses at the output of generator 1 varies according to the law n (t) fi, m (t), where m (t) is the division ratio of the second output of divider 2, equal to w 4 (t); m is the coefficient of proportionality. The division factor for the first output of the divider 2 determines the statistical characteristics of the output pulse stream, the intervals O (t) between pulses in which at each time instant are distributed according to the Erlang law with the parameters n (t) and K (t), where K (t) - the division factor of the first output of divider 2, equal to K4 (t) and cn (.t) when the key is connected to two positions, K is the proportionality factor. The average value of the interspace between pulses for the flow of Erth is the dispersion utf) De (Since when using a key for two positions K (t) K × (t), then a De (i) m fhGPG P is a constant average value of the dispersion of the interval between by pulses it changes according to the law -ш) At a different position of the switch K (t) K4 (t) and (t) "v (t) and De - i.e. at constant dispersion, the mean value changes as Y (1). Thus, the proposed device allows to generate a random pulse signal with independently varying in time moments according to a given law. Claims of the invention Generator of a casual stream of impulses according to the author. St. No. 736362, characterized in that, in order to expand the functionality, a generator of a given time function and a quadrator, the output of which is connected to one of the inputs of the switch block, are inserted, the input of the quad is connected to the generator output of a given time function, to another input of the switch block and to one of the inputs of a controlled frequency divider. Sources of information taken into account in the examination 1. USSR author's certificate 736362, cl. H 03 K 3/84 06/22/78.