JPS57201335A - Ac 2-line system contactless switch - Google Patents

Ac 2-line system contactless switch

Info

Publication number
JPS57201335A
JPS57201335A JP56085091A JP8509181A JPS57201335A JP S57201335 A JPS57201335 A JP S57201335A JP 56085091 A JP56085091 A JP 56085091A JP 8509181 A JP8509181 A JP 8509181A JP S57201335 A JPS57201335 A JP S57201335A
Authority
JP
Japan
Prior art keywords
turned
time
current
increased
current flows
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
JP56085091A
Other languages
Japanese (ja)
Inventor
Yasuyuki Watanabe
Ryoichi Miyake
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 JP56085091A priority Critical patent/JPS57201335A/en
Publication of JPS57201335A publication Critical patent/JPS57201335A/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

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To pretect an internal circuit from being damaged when excessive current flows by connecting a voltage detecting circuit to detect that a constant current circuit consisting of transistors and resistances operates. CONSTITUTION:At normal operation, a transistor TR9 maintains off status during the period a detecting signal (b) is ''L'', and current flows from an AC zero point into a load 3. When the load 3 is shorted, the voltage applied to both the ends of a resistance 15 is quickly increased and the base current of a TR6 starts to flow through a TR7. Since impedance between the collector and emitter of the TR6 is increased at that time, the collector and emitter of the TR6 is increased at that time, the voltage of a point (a) rises, current flows through SSS12, the TR9 is turned on, and TRs 8, 6 are turned off. When excessive current is going to flow into the TR6, the TR6 is turned off at the time of constant current, protecting the TR6 from being damaged.
JP56085091A 1981-06-03 1981-06-03 Ac 2-line system contactless switch Pending JPS57201335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56085091A JPS57201335A (en) 1981-06-03 1981-06-03 Ac 2-line system contactless switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56085091A JPS57201335A (en) 1981-06-03 1981-06-03 Ac 2-line system contactless switch

Publications (1)

Publication Number Publication Date
JPS57201335A true JPS57201335A (en) 1982-12-09

Family

ID=13848926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56085091A Pending JPS57201335A (en) 1981-06-03 1981-06-03 Ac 2-line system contactless switch

Country Status (1)

Country Link
JP (1) JPS57201335A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245218A (en) * 1985-08-21 1987-02-27 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 Non-contact operating electronic switch gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245218A (en) * 1985-08-21 1987-02-27 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 Non-contact operating electronic switch gear

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