SU1764153A1 - Rectangular pulse delay device - Google Patents

Abstract

The invention relates to a pulse technique. The device contains two 1. 2 one-shot, 2, element OR 5, two BAN elements 3.4. Expansion of the application area of the device is achieved by removing the restrictions on the duration of the input pulses as a result of analyzing the input signals on the fronts with the help of BANE logic elements controlled by single-oscillators 1, 2. 4 Il.

Description

lt

.

Wn

I

-

and

 i

u

1

The invention relates to measuring, computing and can be used in devices for converting and processing information.

A device for delaying rectangular pulses is known, which contains the first and second one-shot ones triggered respectively by the leading and falling edges of the input pulse, the inputs of which are connected to the input bus (bus no. 1367143, class H 03 K 5/153, 1986). The device has enhanced functionality due to the delay of pulses arriving at a random time, and increased accuracy by ensuring the independence of the delay time from the frequency of the input pulses and the delay time itself.

A disadvantage of the known device is its small area of use due to the limitation on the duration of the delayed pulse.

 The purpose of the invention is to expand the field of application by removing the restriction on the duration of the input pulses.

This goal is achieved by the fact that a delay device and a falling edge of the input signal, the inputs of which are connected to the input bus, are entered into the delay device and the back edge of the input signal, the inputs of which are connected to the input bus, and the inputs which are connected to the outputs of the elements BAN, the prohibiting inputs of which are connected to the output of the first one-shot, the input is connected directly to the input of the first element BAN, and through the second one-shot - to the input of the second element ZAPR T. Fig. 1 shows the electrical circuit of the proposed device: the first and second single vibrators 1 and 2, the first and second elements BANKS 3 and 4, element 5 OR, input bus 6 and output bus 7; On fmg.2-4 - the diagrams explaining his work.

The device works as follows.

With the arrival of the leading edge of the rectangular input pulse, the bus 6 starts the one-shot 1 and applies a voltage to the prohibitory inputs of elements 3 and 4, which blocks the passage of signals applied to their inputs for a predetermined delay time of the input pulse T3.

The following cases are possible. 1. The duration of the input pulse is greater than the time delay T3 of the pulse (figure 2).

2. The duration of the input pulse is less than the time Te (FIG. 3).

3. The duration of the input pulse is equal to the time T3 (figure 4).

In the first case, after the time T3, the voltage from the output of the single vibrator 1 stops and the output pulse UDx from the bus 6 will come to the output bus 7. Moreover, the duration of the input pulse can be any longer than the time T3 — the pulse duration from the single vibrator output. As a result, the device can provide a delay of input pulses with any

5 long duration without the use of capacitors in high-capacity single-oscillators, which does not depend on the duration of the input pulse.

After forming the back front

0 of the input pulse on the bus 6, the voltage is generated to the time T3 from the output of the one-vibrator 2, which is fed to the output bus 6, thereby extending the duration of the output pulse

5 as far as it was reduced by a pulse from the one-shot 1.

Thus, on the output bus 7, an output Unux pulse is formed with a duration equal to the duration of the input bus.

0 pulse UBx, arriving at the bus 6, but shifted in time by time T3.

In the second case, the forward front of the output pulse on the bus 7 is formed at the moment of the end of the formation

5 output pulses from the one-shot 1, i.e. through the delay time T3, since at this time the output voltage of the output of the one-shot 2 is formed, which through the delay element 4 and the element 5 OR is fed to

0 output bus 7. Since the delay with the launch of the single vibrator 2 was for the duration of the duration of the input pulse, and the duration of the output pulse with the single vibrator 2 is equal to the pulse duration with

5 of one-shot 1, the duration of the output pulse is strictly equal to the duration of the input pulse, but the output pulse 1) output is shifted in time relative to the input pulse by time T3.

0 In the third case, the front edge of the output pulse on the bus 7 is formed at the time of forming the rear edge of the input pulse, since at this moment the rear front of the input pulse 5 and the front edge of the pulse from the single vibrator 2 are formed.

Thus, in the proposed device for delaying rectangular pulses there are no restrictions on the duration of the input pulses.

Claims (1)

 Invention Formula A delay device for rectangular pulses, containing first and second one-shot, the inputs of which are connected to the input bus, characterized in that, in order to expand the scope of application by removing the restriction on the duration of the input pulses, Fie.2 Two BAN elements are introduced, the OR element, whose inputs are connected to the outputs of the BANNER elements, the first inputs of which are connected to the outputs of the first one-shot, the input connected directly to the second input of the first BREAD element and through the second one-shot the BANNER, four 7 Fi.Z Fig.b