SU1246353A1 - Device for separating the first and the last pulse in pulse burst - Google Patents

Abstract

The invention Can be used in systems for collecting and processing information. The purpose of the invention is to increase the reliability of the device. The device contains a trigger 1, elements AND 2 and 3, an element OR 4, a delay element 5 and a NOT element 6. The introduction of the one-shot 1 eliminates false positives and distortions in the duration of the first pulse when the delay time of the delay element 5 deviates from the pulse duration in the packet. 2 Il. Fng.1

Description

The invention relates to a pulse technique and can be used in systems for collecting and processing information.

The purpose of the invention is to increase the reliability of the device by eliminating the false alarms of the device and the distortion of the duration of the first pulse when the delay time of the delay element deviates from the pulse duration in the packet.

Figure 1 shows the functional scheme of the proposed device for allocating the first and last pulses in a packet; 2 shows timing diagrams for his work.

A device for separating the first and last pulses in a bundle contains a trigger 1, two elements AND 2 and 3, an element OR 4, a delay element 5, a element NOT 6 and a one-shot 7, the initial setup bus being connected to the installation input of trigger 1, the first output of which is connected to the first input of the first element AND 2, the output of which is connected to the first output bus and to the first input of the element OR 4, the second input of which is connected to the second output bus and to the output of the second element FROM, the first input of which is connected to the output of the element HE 6, the input of which o connected to the output of the one-shot 7 and to the second input of the first element And 2, the third input of which is connected to the output of the delay element 5 and the second input of the second element And 3, the third input of which is connected to the second output of the trigger 1, the counting input of which is connected to the output of the element OR 4, while the input element 5 of the delay is connected to the input bus and to the input of the one-shot 7.

The device works as follows.

At the initial moment of time, a pulse fed through the bus of the initial installation (Fig. 2b), the trigger 1 is set to the zero state (Fig. 2c, d). In this case, the single resolving potential from its inverse output (FIG. 2d) is fed to the input of the element I 2, and the zero inhibiting potential from its direct output

five

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five

yes (fng.2v) is fed to the input of the second element of the IZ.

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With; When a pulse train arrives at the output bus (fig. 2a), they are formed by the duration of a single vibrator 7, and the duration of the pulses at the output of the one-vibrator 7 (fig.2d) must be 7 + 2л1 ,, where „„ n is the duration of the input pulses pulses, ls - maximum delay delay delay element measurement. The delay time of the delay element 5 (t,) is chosen in such a way that when it fluctuates, it remains greater or equal to the period of the pulse in the packet (T ",), i.e. 1c T, „„ n-dT. Only with the arrival of the second pulse, which indicates the arrival of a packet, rather than a single pulse, at the input of the device, due to the coincidence of the second pulse at the output of the one-shot 7 (fig.2d) and the first delayed delay element a pulse (FIG. 2e) appears on the extrude of the first element AND 2 connected to the first output bus of the device, an impulse appears (fig.2z), which arrives through the element OR 4 at the counting input of the trigger 1j and throws it along its trailing edge into a single state the The zero potential from the inverse output of the trigger 1 (Fig.2 g) prohibits other pulses from the element 2. From the direct output of the trigger 1 to the first input of the element 3 the resolving unit potential enters (fig.2b).

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However, the following burst pulses do not pass to the output of the IZ element, since the output pulses of the one-shot 7 (Fig. 2g) that are inverted by the HE element 6 do not allow the passage of delayed pulses. Only after the end of the burst, when the element 6 of the element 6 does not exist, there is a unit potential (Figure 2g), the last pulse in the package delayed by the delay element 5 (Figure 2e) passes on. the output of the second element And 3. connected to the second output bus (Fig.2i). This impulse

5 through the element OR 4 enters the G4eTH Di input of the trigger 1 and returns it to the initial zero state on a predetermined front (Fig. 2c, d).

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Claims (1)

Invention Formula A device for separating the first and last pulses in a stack containing a trigger, two AND elements, an OR element, a delay element and an NOT element, the initial setup bus being connected to the trigger setup input, the first output of which is connected to the first input of the first AND element whose output is connected with the first output bus and with the first input of the OR element, the second input of which is connected to the second output bus and to the output of the second element AND, the first input of which is connected to the output of the element NOT, the input 463534 which is connected to the second input of the first element And, the third input of which is connected to the output of the delay element and the second input of the second 5 element And, the third input of which is connected to the second output of the trigger, the counting input of which is connected to the output of the SHSh element, while the input of the delay element is connected A bus is connected to the input, characterized in that, in order to improve the reliability of the device, a one-shot is inserted into it, the input of which is connected to the input of the delay element, and the output of the one-oscillator is connected to the input of the element HE. F hhhht fl-JMVMl Editor N. Bobkova Compiled by V. Lobyntsev Tehred L.Oleynik Proof-reader I. Erdeyi 4021/55 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. Project, 4 0ut.2