SU1257818A2 - Pulse shaper - Google Patents

Abstract

The invention may be used in automation devices and computer technology and is complementary to the author. No. 580631. The purpose of the invention is to expand the functionality of the device. The shaper contains RS-triggers 1 and 2, delay element 4 and match element 5. The introduction of the D-flip-flop 3 ensures the operability of the device for any duration of the input pulses, 2 Il. fe./

Description

one

The invention relates to a pulse technique and is intended for use in devices of automation and computer technology and is an improvement of the device according to the author. No. 580631.

The purpose of the invention is to expand the functionality by ensuring operability for any duration of input pulses.

Fig. 1 is an electrical functional diagram of the device; FIG. 2 shows timing diagrams explaining his work.

The pulse shaper contains the first and second RS-flip-flops 1 and 2, the third D-flip-flop 3, delay element 4, coincidence element 5, the first input of which is connected to the input bus bis C-input of the third D-three 3, whose D-input is connected with common bus, S-input - with R-input of the first RS flip-flop, with the first output of delay element 4 and with S-BKO the house of the second RS-flip-flop 2, the R-input of which is connected to the second output of delay element 4, whose input is connected with the output bus 7 and with the direct output of the first RS flip-flop 1, the input of which is connected to the output of the element 5 coincide nor, the second input of which is connected to the inverse output of the second RS flip-flop 2, the third input - to the inverse output of the third D-flip-flop 3,

The pulse shaper operates as follows.

B. The initial state at the direct output of the trigger 1 and on the bus 7 is the potential O (Fig. 2e); at the inverse output of the trigger 2, the potential 1 (FIG. 28) arriving at the second input of the element 5 and opening it for passing input pulse. In this case, on the inverse output of the trigger 3, the potential O (FIG. 2

which closes element 5 at the third entrance. When a pulse arrives on bus 6 (FIG. 2 o), trigger 3 is set by the front of this pulse to 1 at the inverse input (FIG. 2g), since a potential O is held at the D input of this trigger (FIG.). At that, element 5 opens at the third input, and an input pulse passes to its output (FIG. 2 &), which has a level of 57818 J

1, and, hitting the S-input of the trigger 1, sets this trigger to 1 on the forward output (FIG. 23) .- This potential 1 goes to bus 7 and 5 to the input of element 4, where at the first output of element 4 it appears in time, and at its second exit

through time (T) where

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The signal delay between the input and the first output of element 4, and T ,, is the time delay between its first and second outputs (FIG. 2z., e). The potential signal of logical 1 from the first output of element 4,

on the S-inputs of triggers 2 and 3, set-. pours them into O through their inverse outputs and, closes element 5 through its second and third inputs for passing an input pulse (Fig. 26,

g), while the output of element 5 is a logical O (Fig. 26). At the same time, potential 1 from the first output of element 4 enters the R input of trigger 1 and sets it to

O on the direct output (Fig. 2d), since the S-input of this trigger has a potential O (Fig. 2B). Potential O from the output of this trigger goes to bus 7 and to the input element

4, i.e. On bus 7, a pulse of duration t is formed (Fig. 2e). Potential O appears at the first output of element 4 later, and at the end of its output after it appears at the input of element 4 (Fig. 2d, e). Prior to this, at the second output of element 4 there was a potential of logical 1 (Fig. 2e), established there after installing it at the second input of element 4 (Fig, 23). This potential arrives at the R input of trigger 1 and sets this trigger to 1 via the inverse output, thereby opening

element 5 at the second input and drive the device to its initial state (Fig. 2S). At the same time, element 5 remains closed at the third input of logical O from the inverse output of trigger 3 and does not allow its

the output potential of the logical 1 input pulse, even if its duration is much longer (it can be a potential difference in general which does not have a trailing edge, like

FIG. 2a). This prevents the formation of spurious impulses. Element 5 can only be opened if its

If the next output pulse arrives on bus 6 and, with its front, sets trigger 3 to 1 on the inverse output. But in order for the next impulse to arrive at bus 6, it is necessary that the previous one is completed. The proposed device generates only one Output pulse of duration T for an input signal of any duration. Parasitic pulses at its output can not occur.

12578184

Claims (1)

Invention Formula Pulse shaper auth. St. No. 580631, which is different in that, in order to extend the functionality by ensuring operability for any duration of input pulses, a third trigger is spoken to, the S input of which is connected to the R input of the first 10 H5 trigger, C input with input bus; D- input with common bus; inverse output with the third input of the coincidence element. Phage.g Editor N.Gorvat Compiled by T. Sokolov Tehred I. Veres Corrector M. Demchik Order 5039/56 Circulation 816 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 -Production and printing company, Uzhgorod, st. Design, And