SU1173548A1 - Apparatus for selecting channels - Google Patents

Abstract

A CHANNEL SELECTOR, containing a single pulse shaper, an AND element, a trigger, a shift register and a multivibrator, the output of which is connected to the synchronization input of the shift register, whose outputs are device outputs, the lower-order output is connected to the S-input of the trigger, the inverse output of which is connected with the information input of the shift register, and the /-input - with the /-input of the shift register and with the output of the element I, the first input of which is connected to the synchronization input of the shift register, and the input of the single pulse generator A is connected to a power voltage bus, characterized in that, in order to increase reliability, the trigger input is connected to its 5 input, and the C input is connected to the high register shift, and the output of the single pulse shaper is connected to the second input element I.

Description

1 channel

B p

- 2 channel

- p-7 channel

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The invention relates to electronic switching technology, in particular to code converters, and can be used in automation and computer technology in information input / output devices. The aim of the invention is to increase the overgrowth of the junction, the .yst.target. due to the exclusion of unreasonable functioning of and functioning of the impulses n | outputs of the device with the same duration equal to the period of following the synchronization pulses. Ha FIG: 1% | “a functional scheme of the LOR is established; || Choice | channels; in fig. 2 time g (I j, Harplj ijMia, eTO). The channel selector device contains multivibrator 1, shift register 2, single pulse shaper 3, power supply bus 4, And 5 element, D-flip-flop 6. The output of multivibrator 1 is connected the sync input of the shift register 2, the outputs of which are the device outputs. register 2 shift is connected to the output element And 5 and / -input trigger 6, S-input and D-input of which is connected to the output of the low bit of the shift register 2, and C-inOlT is connected to the output of the high bit of the shift register 2, the information input of which is connected to the inverse trigger output 6. The channel selection device works as follows: When voltage supply 7 is applied, a single pulse shaper 3 generates a pulse 8, which coincides on the element And 5 with a pulse 9 from the multivibrator 1. The resulting pulse 10 at the output of the element And 5 acts on / - trigger inputs 6 and shift register 2 and zero them. At the same time, at the information input of the shift register, a level 11 of logical "I." is set. The next impulse 9 from the output of the multivibrator 1 is fed to the synchronization input of the shift register 2 and enters the logical "I", which in turn affects the S-input of the trigger 6, sets it to one and thus sets the signal logical "On at the information input of the register 2 shift. Each subsequent impulse 9 of the multivibrator 1 advances a logical 2 by one bit 12 of the shift register 2 and thus selects the next channel. Thus, the last channel (/ 1st) is also selected, with the next pulse 9 ... of the output of the multivibrator 1 resets the high output of shift register 2 to the logical “O. In this case, the differential 1/0, acting on the C input of the trigger 6 (at its D input at this moment there is a logical "O), sets it to the zero state, and logical 1 is set at its inverse output and the device is ready for the next cycle of work.

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Claims (1)

CHANNEL SELECTION DEVICE, comprising a single pulse shaper, an And element, a trigger, a shift register and a multivibrator, the output of which is connected to a shift register synchronization input, the outputs of which are the device outputs, the low-order output is connected to the trigger S-input, whose inverse output is connected to the information shift register input, and /? - input - with /? - shift register input and output of AND element, the first input of which is connected to the shift register synchronization input, and the input of a single pulse shaper with it is single with the supply voltage bus, characterized in that, in order to increase reliability, the trigger Ώ input is connected to its S-input, and the C input is connected to the highest bit of the shift register, and the output of the single pulse shaper is connected to the second input of element I. figure 1