JPH01144902U

JPH01144902U -

Info

Publication number: JPH01144902U
Application number: JP4060988U
Authority: JP
Priority date: 1988-03-28
Filing date: 1988-03-28
Publication date: 1989-10-05

Description

[Brief explanation of the drawing]

第１は本考案に係るアナログ切替回路の一実施
例を示すブロツク図、第２図、第３図および第４
図は第１図に示した実施例の動作を説明するため
に用いられたタイミングチヤート、第５図は従来
のアナログ切替回路を示すブロツク図である。１，３，９，１０，１８，２０……アンド回路
、２，４，８，１７，１９……ノツト回路、５，
６，１５……フリツプフロツプ、１１……第１の
クロツク発生回路、１２……第２のクロツク発生
回路、１３，２１……オア回路、１６……タイマ
、２２……遅延回路、１０１……リレー接点、１
０２……負荷、１０３，１０７……比較回路、１
０５……リレー駆動部、１０６……リレー。 The first is a block diagram showing one embodiment of the analog switching circuit according to the present invention, and FIGS.
This figure is a timing chart used to explain the operation of the embodiment shown in FIG. 1, and FIG. 5 is a block diagram showing a conventional analog switching circuit. 1, 3, 9, 10, 18, 20...AND circuit, 2, 4, 8, 17, 19...Knot circuit, 5,
6, 15...Flip-flop, 11...First clock generation circuit, 12...Second clock generation circuit, 13, 21...OR circuit, 16...Timer, 22...Delay circuit, 101...Relay Contact, 1
02...Load, 103,107...Comparison circuit, 1
05... Relay drive unit, 106... Relay.

Claims

[Claims for Utility Model Registration] A relay contact that sends out either a first analog signal or a second analog signal that exhibits the same level;
and a control means for switching the relay contact if the levels of these signals are different when sending either of the analog signal and the second analog signal, the control means switching the relay contact. clock generating means for transmitting either a first clock signal or a second clock signal with different cycles to measure the switching timing of the clock; and based on the first clock signal with a short cycle from the clock generating means. a detection means for detecting that the relay contact has been switched a preset number of times or more in a predetermined time; and clock selection means for sending out the second clock signal of a certain period.