SU1378031A1 - Pulse shaper - Google Patents

Abstract

The invention can be used to form long duration pulses following each other. The purpose of the invention, the increase in the operability of the device, is achieved by eliminating failures during the formation of output pulses. The device contains one-shot 1 and 2, the element SHSh-NEZ. element and NOT. 4, the input bus 5, the delay element 6, the output bus 7-10. In comparison with the prototype, the proposed shaper has a shorter recovery time. For this purpose, a delay element 6 and an S1NE element 3 were added to the device. The presence of input trigger pulses during the duration of the generated pulses does not affect the operation of the driver. The shaper has a short recovery time and at the end of the generated pulse is ready for the next start. Timing diagrams explaining its operation are provided in the specification. 2 Il.

Description

The invention relates to a pulse technique and can be used to form long duration pulses following each other.

The purpose of the invention is to increase the reliability of the device by eliminating failures in the formation of output pulses.

Figure 1 shows an electrical functional diagram of the driver; 2 shows timing diagrams for his work.

The pulse shaper contains the first and second one-shot 1 and 2, the element OR NOT 3, the element AND-NO 4, the input bus 5, the delay element 6 and the output bus 7-10, moreover, the bus 5 is connected to the first input of the element AND-HE 4, the second input is connected to the first output bus 7 and the output of the element OR NOT 3, and the output is connected to the input of the first single vibrator 1, the output of which is connected to the second output bus 8, the input of the second single vibrator, the input of the delay element 6 and the first input of the element OR-NOT 3, the second input of which is connected to the third output bus 9 and the output of the same b-rator 2, and the third input - with the fourth output bus 10 and the output of the delay element 6, as one-vibration 1 and 2 can be used zhdzptsy multivibrator, timer, etc.

The pulse shaper operates as follows.

In the initial state, the single vibrators 1 and 2 are in a steady state and at their outputs, as well as at the output of the delay element 6 there is a level O. At the output of the element YLI-NOT 3 there is a level 1.

When a positive start pulse is received via bus 5 (fig. 2a), logical inputs 1 coincide at both inputs of AND-HE. 4 and 0 appears at its output, which starts the first one-oscillator 1. At the output of the first one-oscillator 1, 1 (FIG. 2.b), which is fed to one of the inputs of the element OR — NOT 3. At the same time, at the output of the element OR — NO 3, O (FIG. 2.e) appears, which again sets the output of the element AND-NOT 4 1, After some time, determined by the delay element 6, at the third input of the element OR-NOT 3 (Fig.2.D

O

5 0 5 0 c

0

0

appears 1. At the end of the operating cycle of the one-shot 1, O appears at its output. However, the negative pulse is not interrupted at the output bus 7 by the fact that the output of delay element 6 is still 1. At time f, the falling edge of the first one-shot 1 starts the second one-shot: torus 2.

The delay time of the delay element 6 should be 2-3 times longer than the interval T, i. the gap between the end of the pulse of the one-shot 1 and the beginning of the pulse of the one-shot 2, and significantly less than the duration of the output pulse of the second one-shot 2 (figure 2.c). For the duration of the pulse of the second one-shot 2, the delay element 6 returns to its initial state and O is set to the third output of the element OR NO 3. At the end of the operating cycle of the second one-shot 2, O appears at its output. At all three inputs of the element OR NO 3 coincides logical O, as a result of which} appears at its output, which is fed to the input of the element AND NOT 4. After that, the pulse shaper is ready for restart.

I

The presence of output triggering pulses for the duration of the generated pulses does not affect the operation of the driver. The shaper has a minimum recovery time and is immediately ready to restart at the end of the generated pulse.

Claims (1)

Invention Formula A pulse shaper containing an input bus connected to the first input of the NAND element, the output of which is connected to the input of the first one-oscillator, the output of which is connected to the input of the second one-oscillator, and the output bus, characterized in that in order to increase the reliability of the device due to elimination of failures in the formation of output pulses, a delay element and an OR-NOT element are introduced into it, the first input of which is connected to the output of the first one-vibrator and the input of the delay element, the second input to the output 313780314 the second one-shot, the third input is with the output bus and the second input is the element with the output of the delay element, and the output is NAND. QOye. 2