SU991585A1 - Pulse train shaping device - Google Patents

Description

(54) DEVICE FOR THE FORMATION OF A SERIES OF PULSES

one

The invention relates to a silt technique and can be used in automatic control and regulation devices.

A device for forming a series of pulses is known, which contains a reference pulse generator, a valve and a trigger, two scale circuits with different conversion factors and two additional gates, moreover, with even inputs of the counting circuits are connected / een respectively through additional gates to the output of the reference pulse generator, and the outputs of the scaling circuits to the zero and single inputs of the trigger, while the single output of the trigger is connected to the YEAR of one of the additional gates, and the zero output - ju to the other of the additional tional valve 1.

The disadvantage of this device is the distortion of the duration of the first pulse in the series, which occurs if, at the initial moment, the signal with one,

The first trigger output, which opens the first valve, arrives later than the leading edge of the pulse from the generator output.

It is also known a device for forming a series of pulses, comprising a generator of reference pulses, connected via the first element AND to the Ban element, the other input of which is connected through a counting unit and the element OR

10 with the trigger inputs and with the outputs of two other scaling units, the inputs of which through the corresponding elements And are connected to the output of the reference pulse generator, and the outputs of the trigger

15 are connected to the corresponding elements And 12.

The disadvantage of this device is its complexity.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device for forming a series of pulses containing a generator

The main inputs, the output of which is connected to the first inputs of the first and the second And elements, the second inputs of which are connected to the trigger output, the first input of which is connected to the output of the first scaler, the output of the first element And is connected to the input of the second scaler, the third element And, output The second counting unit is connected to the first input of the third element I, the second input of which is connected to the control inputs of the counting units, the input of the first of which is connected to the output of the reference pulse generator, and the output is third And the second element is connected to a second input of the trigger.

The drawing shows the function of the block diagram of the device.

The device for forming a series of impulses comprises a generator 1 of reference pulses, elements AND 2-4, trigger 5, scaling units 6 and 7, an output bus 8 and a bus 9 of control signals.

The device works in the following way.

When the control signal is applied to the bus 9 corresponding to the logical O, the output of the trigger 5 sets a zero level, which closes the elements 2, 3; moreover, the zero control signal, entering the counting blocks 6 and 7, prohibits their operation from the OUTPUT my account. Thus, the device bus 8 signals from the generator 1 is not received. The arrival on the bus 9 of the control signal, correspondingly logical. 1, removes the prohibition on the operation of the input of the direct account of the conversion unit 7, but does not change the status of the trigger 5 and, therefore, does not open the AND 2.3 elements, the signals from the output of the generator 1 go to the input of the direct account of the open red - counting unit 7. At the moment of arrival on the counting unit 7 of the v-th pulse, at its output there is a zero pulse, which sets the trigger 5 Bte to a single state, and the elements 2,3 and 2,3 are open, while to the input of the direct account of the conversion unit 6 from the output of the generator 1 are received and pulses.

At the moment when the yiv-ro pulse arrives at the output of the scaling unit 6 by means of a zero imputp in the vehicle, which passes through the E 4 elements. The second input of the trigger 5 sets the trigger 5 to the zero state, a zero signal from the output of the trigger 5 closes the I 2 elements, 3 and the arrival of pulses from the output of generator 1 to the bus 8 of the device and to the input of counting unit 6 will stop. Thus, L determines the number of pulses in a packet.

As already indicated above, the impulses enter the direct account of the recalculation unit 7 from the output of generator 1, and as soon as the bus 9 and the input of the regreg account of the recalculation unit. 7 a logical 1 signal will be received, the scaling unit 7 is set to the working state, zero pulses with a following period will appear at its output, -n, where T is the period / following of the pulses from the generator 1, U) is a number within capacity scaling scheme.

These pulses are set each time through the AND 4 element 4 trigger 5 into one state, thereby opening the AND 2.3 element, therefore their follow-up period is also the period of the pulse bursts on the bus 8 of the device. The duration of this period is determined by the number VI with a stable oscillator frequency of 1, with V17VT1. ; The arrival on bus 9 of a control signal corresponding to a logical O stops the formation of bursts. To resume it, a single control signal must be sent to bus 9 again.

Thus, in the proposed pulse shaper, the regulation of a series of pulses is formed and the period between them is much simpler than in

d known device.,

formula of invention

A device for shaping a series of pulses containing a generator of reference pulses, the output of which is connected to the first inputs of the first and second elements And, the second inputs of which are connected to the output of the trigger, the first input of which is connected to the output of the first conversion unit, the output of the first element And connected to the isod of the second recalculation unit, the third element AND, characterized in that, to improve the reliability of the device, the output of the second recalculation unit is connected to the first input of the third element, the second input of which is COG5 & 915-56

Diven with control ydshk kdsody recalculate Sources of information,

blocks, the input of the first KOTOI X is taken into account in the examination

connected to the output of the reference generator1. USSR author's certificate

impuls, and the output of the third element number 488328, cl. H 03 K 3/64, 1974.

And connected to the second input of the trig-s 2. USSR Certificate of Authorship

Hera. № 661734, CP. N OZ K 3/64, 1977.

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Claims (2)

SUMMARY OF THE INVENTION A device for generating a series of pulses, comprising a reference pulse generator, the output of which is connected to the first inputs of the first and second elements AND, the second inputs of which are connected to the output of the trigger, the first 50, whose input is connected to the output of the first conversion block, the output of the first element And is connected with the input of the second conversion unit, the third element And, characterized in that, with the aim of increasing the reliability of the device, in it the output of the second conversion unit is connected to the first input of the third element And, second whose first input is connected to the control inputs of the conversion blocks, the input of the first of which is connected to the output of the reference pulse generator, and the output of the third element And is connected to the second input of the trigger. Information sources taken into account during the examination 1. USSR author's certificate No. 48832 8, cl. H 03 K 3/64, 1974. 2. USSR author's certificate No. 661734, kp. H 03 K 3/64, 1977.