JPS57150221A - On and off detecting circuit of switch - Google Patents

On and off detecting circuit of switch

Info

Publication number
JPS57150221A
JPS57150221A JP56035264A JP3526481A JPS57150221A JP S57150221 A JPS57150221 A JP S57150221A JP 56035264 A JP56035264 A JP 56035264A JP 3526481 A JP3526481 A JP 3526481A JP S57150221 A JPS57150221 A JP S57150221A
Authority
JP
Japan
Prior art keywords
terminal
switch
level
clock signal
chattering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56035264A
Other languages
Japanese (ja)
Inventor
Tomoaki Uchida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56035264A priority Critical patent/JPS57150221A/en
Publication of JPS57150221A publication Critical patent/JPS57150221A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/125—Discriminating pulses
    • H03K5/1252—Suppression or limitation of noise or interference

Abstract

PURPOSE:To prevent a malfunction due to chattering, by providing a switch on a terminal D of a D type flip-flop, and supplying a clock signal to a terminal CK. CONSTITUTION:A D type flip-flop outputs a state applied to a terminal D, from a terminal Q when a clock signal 6 applied to a terminal CK rises. A period of the clock signal 6 is set larger than the chattering time. In case when a switch 1 is closed, the clock signal 6 is inputted during the chattering period, and in case of either an H level or an L level of the terminal D, only one output Q is generated at every one operation of the switch 1. In this way, whenever the switch is operated once, the H level and the L level are generated alternately.
JP56035264A 1981-03-13 1981-03-13 On and off detecting circuit of switch Pending JPS57150221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56035264A JPS57150221A (en) 1981-03-13 1981-03-13 On and off detecting circuit of switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56035264A JPS57150221A (en) 1981-03-13 1981-03-13 On and off detecting circuit of switch

Publications (1)

Publication Number Publication Date
JPS57150221A true JPS57150221A (en) 1982-09-17

Family

ID=12436939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56035264A Pending JPS57150221A (en) 1981-03-13 1981-03-13 On and off detecting circuit of switch

Country Status (1)

Country Link
JP (1) JPS57150221A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347189A2 (en) * 1988-06-13 1989-12-20 Nissan Motor Co., Ltd. Circuit for protecting input of semiconductor device
JPH04223709A (en) * 1990-12-26 1992-08-13 Tokyo Electric Co Ltd Switching circuit
CN103095257A (en) * 2013-01-07 2013-05-08 上海斐讯数据通信技术有限公司 Anti-shake circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347189A2 (en) * 1988-06-13 1989-12-20 Nissan Motor Co., Ltd. Circuit for protecting input of semiconductor device
JPH04223709A (en) * 1990-12-26 1992-08-13 Tokyo Electric Co Ltd Switching circuit
CN103095257A (en) * 2013-01-07 2013-05-08 上海斐讯数据通信技术有限公司 Anti-shake circuit

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