SU752767A2 - Pulse train generator - Google Patents

Description

The invention relates to radio engineering and can be used in automation devices and pulse technology to generate a discontinuous sequence of pulses.

According to the main author. St. No. 525233 ⁵ known pulse series generator containing a stable frequency generator, a waiting multivibrator, pulse shaper / reset device, triggers and elements And [D · ^{, C}

In this apparatus, a stable oscillator output is connected to the input of the pulse duration ,, through the first AND gate - to the second input of the second AND gate and via a first trigger - to the first input of the first AND gate, a first AND gate output is coupled through serially connected _and a second · trigger and second element AND with the first input of the third trigger. The output of the third trigger is connected through the standby multivibrator to the input of the reset device and to the input of the stable frequency generator. The second inputs of all triggers are combined and connected to the output of the reset device.

The disadvantage of this generator is the limited functionality due to the fact that the device generates a series of pulses only with a constant number of pulses, where the number of output pulses is equal to the number of triggers used.

Nel invention - the expansion of the functionality of the device.

This goal is achieved in that the pulse series generator, containing ⁷ , a stable frequency generator, the output of which is connected to the input of the pulse width former and the first inputs of the first trigger and the first element And, the second input of which is connected to the output of the first trigger, is the first output; of the first element And is connected to the first inputs of the second trigger and the second element And, the second input of which is connected to the output of the second trigger, and the output of the second element And is connected through the third trigger to the input of the multivibrator, the output of which is connected to the input of the stable frequency generator and the input of the reset unit, ₅ AND elements are additionally introduced into it, and each additional AND element is included between the output of the reset unit and the second input of the corresponding trigger. 10

The drawing shows a functional diagram of a pulse series generator.

The pulse series generator comprises a stable frequency generator 1, a waiting multivibrator 2, a driver 3 of pulse width 15, a reset unit 4, triggers 5, 6, 7, elements 8, 9, additional elements ₍ 10, 11, 12, buses

13-15 control signals.

We take the state of the triggers, at which the resolving potential at the output is 20, for a unit (1), and the state at which the output is prohibiting potential, at zero (O).

The pulse series generator operates 25 as follows.

In the initial state, the triggers 5, 6 are in the zero state, at the second inputs of the additional elements I. 10, 11, 12 are the resolving potentials that come through the buses 13-15 of the control signals.

When the power is turned on, a pulse appears at the output of the stable-frequency generator 1, along the trailing edge of which the trigger 5 is thrown (amplified to a single state). The trigger potential of trigger 5 prepares the element And 8. The second pulse of the generator 1 is ...

. the beat frequency passes through the open element 40 at the first input And 8 to the input of the trigger 6. The trigger 6 is tipped over the trailing edge of the second pulse of the generator 1 stable frequency. The resolving potential of trigger 6 prepares the element And 9. The third pulse of the stable frequency generator 1 passes through the element And 9, which is open at the first input, to the input of the trigger 7. Trigger 7 overturns along the trailing edge of the third pulse ₅₀ of the stable frequency generator 1. From the output of the trigger control signal 7 is input to monostable multivibrator 2. The output of monostable multivibrator 2 the signal which is forbidden schaet passage ₅₅ pulses at the output of the generator 1 stable frequency. The pulses of the generator 1 of a stable frequency arrive at the input of the shaper 3 of the pulse duration, from the output of which three pulses formed by the duration are taken.

After the time determined by the pause between the series of pulses, the waiting multivibrator 2 returns to its original state, as a result of which the inhibit signal is removed from the stable frequency generator 1.

On the trailing edge of the inhibit signal of the waiting multivibrator 2, an impulse is generated at the output of the reset unit 4, which passes through the additional potential elements And 10, 11, 12 to the second inputs of the triggers 5, which are open from the bus of the control signals 13, 14, 15 to the second inputs of the triggers 5, 6, 7, setting them to their original (zero) state.

Thus, a series of three pulses with a given duration is formed at the output of the device.

The process is repeated, and the next series of pulses * begins at the moment the first stable pulse frequency generator 1 appears after a pause.

If the inhibitory potentials are supplied to the second input of the additional element And 10 via the control signal bus 13, then after the formation of a series of pulses, the pulse of the reset unit 4 passes only to the second inputs of the triggers 6, 7. The triggers 6, 7 are set to the initial (zero) state, and trigger 5 remains in a single state. In this case, a series of two pulses is formed at the output of the device, since the first pulse of the generator of stable frequency 1 passes through the open element And 8 to the input of trigger 6.

If the inhibitory potentials on the bus 13, 14 are fed to the second inputs of additional elements And 10, 11, then a series of one pulse is formed at the output of the device.

If the inhibitory potential via the control signal bus 15 is fed to the second input of an additional element And 12, then a series of four pulses is formed at the output of the device.

Thus, the proposed generator allows you to expand the functionality of the device by changing the number of pulses in a series.

Claims (1)

1. USSR author's certificate No. 525233, cl. H 03 K 3/72, 12/08/74.