JPS5731230A - Contactless switching circuit - Google Patents

Contactless switching circuit

Info

Publication number
JPS5731230A
JPS5731230A JP10604880A JP10604880A JPS5731230A JP S5731230 A JPS5731230 A JP S5731230A JP 10604880 A JP10604880 A JP 10604880A JP 10604880 A JP10604880 A JP 10604880A JP S5731230 A JPS5731230 A JP S5731230A
Authority
JP
Japan
Prior art keywords
detector
input signal
light
resistance
volume
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
JP10604880A
Other languages
Japanese (ja)
Other versions
JPS6126251B2 (en
Inventor
Yukio Iitaka
Toshiro Abe
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP10604880A priority Critical patent/JPS5731230A/en
Publication of JPS5731230A publication Critical patent/JPS5731230A/en
Publication of JPS6126251B2 publication Critical patent/JPS6126251B2/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
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors

Abstract

PURPOSE:To ensure the stepped response properties regardless of the rise or fall of an input signal, by connecting in series a semiconductor light emitting element that emits the volume of light proportional to the value of the input signal, a semiconductor photodetector and a current limiting resistanc to a power source. CONSTITUTION:The current passed through a resistance 5 and a diode flows to a light emitting element 2 6 as the input signal of an input terminal 4 increases. Thus the volume of emitted light increases, and the detector 3 is set within the range of on-state. Then the current limited by the voltage of a power source 1 and a resistance 7 flows to increase the light volume of the element 2, and the detector 3 is kept at the steady on-state. The current flowing through the element 2 is reduced when no input signal exists with a large value of the resistance 7, and the detector 3 is slightly turned on. If the detector 3 is turned off under such conditions, no light is emitted from the element 2. Thus the detector 3 is kept off.
JP10604880A 1980-07-31 1980-07-31 Contactless switching circuit Granted JPS5731230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10604880A JPS5731230A (en) 1980-07-31 1980-07-31 Contactless switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10604880A JPS5731230A (en) 1980-07-31 1980-07-31 Contactless switching circuit

Publications (2)

Publication Number Publication Date
JPS5731230A true JPS5731230A (en) 1982-02-19
JPS6126251B2 JPS6126251B2 (en) 1986-06-19

Family

ID=14423739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10604880A Granted JPS5731230A (en) 1980-07-31 1980-07-31 Contactless switching circuit

Country Status (1)

Country Link
JP (1) JPS5731230A (en)

Also Published As

Publication number Publication date
JPS6126251B2 (en) 1986-06-19

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