SU1432753A1 - Pulse delay device - Google Patents

Abstract

The invention relates to instrumentation technology and can be used to form delayed pulses with necessary. their phase stabilization in the case of periodically repeating the starting pulses. The purpose of the invention is to improve the accuracy of tracking the phase of the output pulses - achieved by introducing a series-connected trigger 1, a constant component block 4 and a differential amplifier 5. In addition, the device includes an integrator 2, a comparator 3, a reference voltage source 6, an input bus 7, output bus 8. The introduction of these elements and their connections allow, when changing in a wide range of the frequency of the following input pulses, to make an automatic correction of the control voltage, and hence, the delay in the formation of output pulses, ensuring a high phase stability of the delayed pulses. 1 il. cl

Description

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The invention relates to instrumentation technology and can be used to form delayed pulses with the need for their phase stabilization in the case of periodically triggered trigger points.

pulses.

The purpose of the invention is to improve the accuracy of tracking the output pulse phase.

The goal is achieved by the addition of 7 /, the additional introduction of a series-connected trigger, a selection block for a constant component, and a differential amplifier.

The drawing shows the overall functional diagram of the proposed device.

The device comprises a trigger 1, an integrator 2, a comparator 3, a block 4 for allocating a constant component, a differential amplifier 5, a source 6 of the reference voltage, an input bus 7, an output bus 8.

The input bus 7 of the device is connected to the first input of the trigger 1, the output of which is connected to the input of the integrator .2 and the input of the allocation unit 4 of the constant component, the output of which is connected to the first input of the differential amplifier 5, the second input of which is connected to the output of the source 6 the reference voltage, and the output is connected to the first input of the comparator 3, the second input of which is connected to the output of the integrator 2, and the output is connected to the second input of the trigger 1.

The constant-voltage block 4 serves to generate a signal directly proportional to the duration of the input pulses and inversely proportional to their period. As a block 4, for example, a low-pass filter can be used — in the simplest case, it can be an integrating RC-chain ( other options are possible for the technical implementation of the block 4 of the constant component).

The integrator 2 serves to form a linearly varying voltage and has the possibility of being reset to the zero state and can be carried out according to any of the known schemes.

Source 6 must provide adjustable voltage and is used to control the operation of the device.

five

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five

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setting a certain phase delay for the formation of output pulses.

The whole device can be made on the basis of typical microcircuits.

The device works as follows.

In the initial state, trigger 1 is cocked, blocking the operation of integrator 2.

When the trigger pulse arrives on the input bus 7 on its leading edge, the trigger 1 is reset, allowing the operation of the integrator 2, at the output of which a linearly increasing voltage, for example, is generated. When this voltage reaches the voltage level at the output of the differential amplifier 5, the comparator 3 is triggered, thereby triggering 1 and resetting the integrator 2. A short pulse is generated on the output bus 8 of the device, delayed relative to the leading edge of the input trigger pulse.

The duration of the time delay of the formation of pulses on the output bus 8 is determined by the expression:

 K, and

Upr

and

where K is a coefficient characterizing the rate of change of voltage at the output of integrator 2; - the voltage at the output of the amplifier 5. At the same time at the output of the block 4 of the allocation of the constant component there is a national

control

and to

f,

1 3 where Ki2 is the conversion factor

block 4; f - the frequency of the following input

pulses.

Considering that the differential amplifiers: 5 has a gain factor, it can be obtained that in this device the phase angle of the formation of delayed pulses is equal to

L (J4t 21Г (+.), (1) f J U, j

where Ug is the voltage at the output of source 6 of the reference voltage. ,

 From the form: 1.y (1) it can be seen that when the condition of K shah is fulfilled, in the proposed device it is the phase I delayed formation

pulses does not depend on the frequency of the output pulses and is determined only by the voltage of the source 6 of the reference voltage:

.

When changing in a wide range of the frequency of the input pulses, an automatic correction occurs.

control voltage, and, of course, delay, the formation of output pulses, thereby ensuring a high phase stability of the formation of delayed pulses,

a1432753

Formula

the invention

A pulse delay device containing a series-connected integrator and a comparator, a voltage source, characterized in that, in order to improve accuracy, 10 series-connected trigger are introduced into it, a DC selection unit and a differential amplifier connected by a second input to the source output the reference voltage, and 15 output - to the second input of the comparator, the output of which is connected to the first input of the trigger, the second input of which is connected to the input bus of the device, and the output is connected to 20 integrator approach.

Claims (1)

Claim A pulse delay device comprising a serially connected integrator and a comparator, a reference voltage source, characterized in that, in order to increase accuracy, a serially connected trigger, a DC component isolation unit and a differential amplifier connected to the output of the reference voltage source by a second input are introduced into it, and output - to the second input of the comparator, the output of which is connected to the first input of the trigger, the second input of which is connected to the input bus of the device, and the output is connected to the input and integrator.