SU1589262A1 - Redundant clock pulse generator - Google Patents

Abstract

The invention relates to computing and can be used in control systems of increased reliability, telemechanics systems and devices that have been operating without service by the operator for a long time. A distinctive feature of the device is that it eliminates the need for adjustment and reduces the detection time of a channel oscillator. The aim of the invention is to increase reliability by simplifying what is achieved by introducing the priority encoder 2, as well as introducing into each channel generator two multivibrators 6, 7. 2 Il.

Description

1

The invention relates to computing and can be used in control devices, synchronizers with increased reliability requirements.

The purpose of the invention is to increase reliability by simplifying.

FIG. 1 is a block diagram of a redundant clock-and-bibk pulse generator; in fig. 2 - diagrams of e | work (a - at the nominal clock frequency TJOTe, b - at the frequency of the clock generator, E - when the oscillation of the clock generator is disrupted).

 The redundant clock generator 1 mpulse contains channel generators 1, priority encoder 2, multiplexer 3, its output 4,

Each channel generator 1 contains |: it clock 5, multivibrators 6 and 7,

Multivibrators 6 and 7 can be performed on a K155AGZ microcircuit. The priority encoder can be executed on IC chip KM555IV1,; The duration of the output pulse of the Multivibrator 6 t ,, is selected by

: (/ &

formula

one

(one)

mix

the duration of the output pulse of the multivibrator 6; minimum hour allowed

tota ta.ktovogo generator 5,

Consider the operation of one of the channels of the redundant generator. At Q Operability, the clock generator 5 generates pulses of the nominal frequency, which arrive at the corresponding search for the input of the multiplexer 3 and the input of the multivibrator 6, the output of which 45 produces pulses of search duration and the frequency of the clock generator 5 and enter the input of the multivibrator 7. At the first input pulse

multivibrator 7 is cocked and shaped.

logical level corresponding to the health of the channel.

When the frequency of the clock generator 5 rises above the permissible one, the condition (1) of the multivibrator 6 is violated and is de-energized and stops generating pulses.

When a clock oscillator 1 oscillates, the multivibrator 7 is not cocked and does not generate output pulses.

d 5

0

five

Q

five

Q 5

.

0

five

In both cases, when the multivibrator 6 does not generate pulses, the multivibrator 7 is not energized and generates a logical level corresponding to the failure of the channel.

Thus, the information inputs of the priority encoder 2 receive information from the outlets of the multivibrators 7 about the health of each channel.

When the redundant generator is switched on, the frequency of that channel generator 5, which earlier than the others encodes the priority signal to the priority encoder 2, arrives at the input of the multiplexer 3.

In the event of a channel failure, the priority chip 2 connects another channel to the output of multiplexer 3.

At the output of the priority encoder 2, a binary channel code is generated with a healthy clock generator 5, which has the highest priority. When the channel of this channel leaves the pitch 2, the new binary code of the channel with the highest priority is formed. volume of all serviceable, and so on.

The operability of the redundant generator remains as long as at least one generator channel is operational.

Claims (1)

Invention Formula A redundant clock generator containing p channel generators and a multiplexer, each channel generator comprising a clock generator, the output of which is connected to the corresponding information input of the multiplexer, the output of which is the output of the redundant clock generator, in order to increase reliability due to the simplification, the priority 1chiphthrator is entered into it. and two multivibrators are introduced into each channel generator, and in each channel generator the clock generator output is connected to the input of the first multiplexer, the output of which is connected to the input of the second multivibrator, the output of which is connected to the corresponding input of the priority encoder, the output group of which is connected to the group of address inputs of the multiplexer. TUS l / fHOH.I Ha5 U / Max Gi5 V / Generator5 5.G J  Tib  I.U7 Phage. 2