JPS5784622A - Alternating current two-wire type contactless switch - Google Patents

Alternating current two-wire type contactless switch

Info

Publication number
JPS5784622A
JPS5784622A JP16161180A JP16161180A JPS5784622A JP S5784622 A JPS5784622 A JP S5784622A JP 16161180 A JP16161180 A JP 16161180A JP 16161180 A JP16161180 A JP 16161180A JP S5784622 A JPS5784622 A JP S5784622A
Authority
JP
Japan
Prior art keywords
output
current
scr2
contactless switch
output terminals
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
JP16161180A
Other languages
Japanese (ja)
Inventor
Kiyoshi Miyamoto
Kenji Ueda
Toshihiko Maruo
Akimitsu Ogata
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP16161180A priority Critical patent/JPS5784622A/en
Publication of JPS5784622A publication Critical patent/JPS5784622A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To simply reduce leakage current and residual voltage at the same time, by providing a current shunt path consisting of a semiconductor switching element in parallel with a current limit element. CONSTITUTION:When an output of a detection circuit 2 is at L level, an emitter follower output from a transistor Q22 is at L, and no SCR2 is triggered and an off-output state is obtained between the output terminals (a) and (b). Thus, the resistance value of a resistor 21 is increased and the leakage current between the output terminals (a) and (b) can be reduced. When an output of the detection circuit 2 is at H level, since the Q22 turns on, the SCR2 is triggered and an on- state can be obtained between the output terminals (a) and (b). Since a current flows to the base of a Q21, current shunt path is formed in parallel with the resistor R21 and sufficient driving current can be applied to the internal circuit of a contactless switch even if the conduction angle of the SCR2 is sufficiently large, and the residual voltage can be reduced.
JP16161180A 1980-11-17 1980-11-17 Alternating current two-wire type contactless switch Pending JPS5784622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16161180A JPS5784622A (en) 1980-11-17 1980-11-17 Alternating current two-wire type contactless switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16161180A JPS5784622A (en) 1980-11-17 1980-11-17 Alternating current two-wire type contactless switch

Publications (1)

Publication Number Publication Date
JPS5784622A true JPS5784622A (en) 1982-05-27

Family

ID=15738448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16161180A Pending JPS5784622A (en) 1980-11-17 1980-11-17 Alternating current two-wire type contactless switch

Country Status (1)

Country Link
JP (1) JPS5784622A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587928A (en) * 1981-07-07 1983-01-17 Koyo Denshi Kogyo Kk Dc two-wire type proximity switch
JPS5944740A (en) * 1982-09-08 1984-03-13 光洋電子工業株式会社 Dc 2-wired proximity switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024765A (en) * 1973-04-14 1975-03-17
JPS5446381A (en) * 1977-09-20 1979-04-12 Omron Tateisi Electronics Co Twooline aac switching type proximity switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024765A (en) * 1973-04-14 1975-03-17
JPS5446381A (en) * 1977-09-20 1979-04-12 Omron Tateisi Electronics Co Twooline aac switching type proximity switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587928A (en) * 1981-07-07 1983-01-17 Koyo Denshi Kogyo Kk Dc two-wire type proximity switch
JPH0350450B2 (en) * 1981-07-07 1991-08-01 Koyo Electronics Ind Co
JPS5944740A (en) * 1982-09-08 1984-03-13 光洋電子工業株式会社 Dc 2-wired proximity switch

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