JPS5755622A - Electronic switch - Google Patents

Electronic switch

Info

Publication number
JPS5755622A
JPS5755622A JP13137380A JP13137380A JPS5755622A JP S5755622 A JPS5755622 A JP S5755622A JP 13137380 A JP13137380 A JP 13137380A JP 13137380 A JP13137380 A JP 13137380A JP S5755622 A JPS5755622 A JP S5755622A
Authority
JP
Japan
Prior art keywords
current
base
load
flows
turns
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
JP13137380A
Other languages
Japanese (ja)
Inventor
Toshibumi Fukuyama
Norio Onchi
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 JP13137380A priority Critical patent/JPS5755622A/en
Publication of JPS5755622A publication Critical patent/JPS5755622A/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
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To achieve IC-implementation by eliminating the loss of the base current of a transistor (TR) by varying the base current of the TR according to a load current. CONSTITUTION:Light from a light emission diode LED is reflected by a body to be detected and its reflected light is incident to a phototransistor PHT, which permits a detecting circuit to send its output to the base of a TR11. As the output of the detecting circuit goes down to a low level, the TR11 turns off and the bae current of a TR12 flows through a resistance 23 to turn on the TR12. Then, a TR13 turns on, and consequently a current flows to a load. When a load current is small, a current flowing via route (b) increases and a current flowing via a route (a) decreases correspondingly. Therefore, the base current of the TR12 decreases, so its emitter current becomes small, thereby decreasing the base current of the TR13. When the load current is large, almost all of the currnt flowing through the resistance 23 flows to the base of the TR12, and the base current of the TR13 increases.
JP13137380A 1980-09-19 1980-09-19 Electronic switch Pending JPS5755622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13137380A JPS5755622A (en) 1980-09-19 1980-09-19 Electronic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13137380A JPS5755622A (en) 1980-09-19 1980-09-19 Electronic switch

Publications (1)

Publication Number Publication Date
JPS5755622A true JPS5755622A (en) 1982-04-02

Family

ID=15056414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13137380A Pending JPS5755622A (en) 1980-09-19 1980-09-19 Electronic switch

Country Status (1)

Country Link
JP (1) JPS5755622A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006135714A (en) * 2004-11-08 2006-05-25 Yamatake Corp Position detector and converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006135714A (en) * 2004-11-08 2006-05-25 Yamatake Corp Position detector and converter

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