JPS56131229A - Two-wire contactless switch - Google Patents

Two-wire contactless switch

Info

Publication number
JPS56131229A
JPS56131229A JP3564680A JP3564680A JPS56131229A JP S56131229 A JPS56131229 A JP S56131229A JP 3564680 A JP3564680 A JP 3564680A JP 3564680 A JP3564680 A JP 3564680A JP S56131229 A JPS56131229 A JP S56131229A
Authority
JP
Japan
Prior art keywords
voltage
circuit
current
sensor part
constant
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.)
Granted
Application number
JP3564680A
Other languages
Japanese (ja)
Other versions
JPS614218B2 (en
Inventor
Hisatoshi Nodera
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
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP3564680A priority Critical patent/JPS56131229A/en
Publication of JPS56131229A publication Critical patent/JPS56131229A/en
Publication of JPS614218B2 publication Critical patent/JPS614218B2/ja
Granted 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

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To reduce both a leakage current and residual voltage by flowing only the current that a sensor circuit requires at any time, by using a constant current circuit which performs constant-current operation even at a low voltage by using FET. CONSTITUTION:When the output of sensor part 51 is at H, transistor Tr3 is turned off, and Trs 2 and 1 are therefore both turned off to supply sensor part 51 with a current passed through constant current circuit 6, so that its voltage is stabilized by Zener diode ZD2. When the output of sensor part 51 is at L, Tr1-3 turns on. At this time, if the residual collector-emitter voltage of Tr1 is denoted as VA, voltage VC applied to sensor part 51 is the difference between VA and voltage VB dropping across circuit 6. This circuit 6 can have stable constant-current characteristics even in a low-voltage range by using FET1. Voltage VA, on the other hand, should be higher than the sum of voltage VC and the voltage that circuit 6 requires, but the voltage of circuit 6 can be made extremely low, so that voltage VA can be reduced extremely.
JP3564680A 1980-03-18 1980-03-18 Two-wire contactless switch Granted JPS56131229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3564680A JPS56131229A (en) 1980-03-18 1980-03-18 Two-wire contactless switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3564680A JPS56131229A (en) 1980-03-18 1980-03-18 Two-wire contactless switch

Publications (2)

Publication Number Publication Date
JPS56131229A true JPS56131229A (en) 1981-10-14
JPS614218B2 JPS614218B2 (en) 1986-02-07

Family

ID=12447633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3564680A Granted JPS56131229A (en) 1980-03-18 1980-03-18 Two-wire contactless switch

Country Status (1)

Country Link
JP (1) JPS56131229A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127341U (en) * 1983-02-14 1984-08-27 和泉電気株式会社 AC 2-wire proximity switch
DE3238396C1 (en) * 1982-04-21 1985-11-21 Ifm Electronic Gmbh, 4300 Essen Electronic switching device, preferably operating contactlessly
JPS6170818A (en) * 1984-07-26 1986-04-11 イフム、エレクトロ−ニク、ゲゼルシヤフト、ミツト、ベシユレンクテル、ハフツング Electronic switch unit operating without contact as much as possible
EP0092710B1 (en) * 1982-04-21 1986-07-23 i f m electronic gmbh Electronic switching device, preferably operating without making contact
EP0298329A2 (en) * 1987-07-07 1989-01-11 i f m electronic gmbh Electronic switching device, preferably operating without contact

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3238396C1 (en) * 1982-04-21 1985-11-21 Ifm Electronic Gmbh, 4300 Essen Electronic switching device, preferably operating contactlessly
EP0092710B1 (en) * 1982-04-21 1986-07-23 i f m electronic gmbh Electronic switching device, preferably operating without making contact
JPS59127341U (en) * 1983-02-14 1984-08-27 和泉電気株式会社 AC 2-wire proximity switch
JPS6170818A (en) * 1984-07-26 1986-04-11 イフム、エレクトロ−ニク、ゲゼルシヤフト、ミツト、ベシユレンクテル、ハフツング Electronic switch unit operating without contact as much as possible
EP0298329A2 (en) * 1987-07-07 1989-01-11 i f m electronic gmbh Electronic switching device, preferably operating without contact

Also Published As

Publication number Publication date
JPS614218B2 (en) 1986-02-07

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