JPS5477561A - Circuit to control transistor switching - Google Patents

Circuit to control transistor switching

Info

Publication number
JPS5477561A
JPS5477561A JP14472677A JP14472677A JPS5477561A JP S5477561 A JPS5477561 A JP S5477561A JP 14472677 A JP14472677 A JP 14472677A JP 14472677 A JP14472677 A JP 14472677A JP S5477561 A JPS5477561 A JP S5477561A
Authority
JP
Japan
Prior art keywords
film
transistor
voltage
transistor switching
switching
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
JP14472677A
Other languages
Japanese (ja)
Inventor
Masuji Sato
Takao Furuumi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14472677A priority Critical patent/JPS5477561A/en
Publication of JPS5477561A publication Critical patent/JPS5477561A/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 control the transistor switching just through variation of the quantity of light and with a simple constitution by connecting one end of the resistance film to the DC power source with the other end earthed and then converting the quantity light irradiated the photoconductive film into the voltage to transmit it to the transistor. CONSTITUTION:The switching is controlled for transistor Tr1 by the control voltage which is applied between the base and emitter of Tr1. Resistance film 7, photoconductive film 8 and metal film 9 are provided in parallel to each other and in oblong formation of substrate 6. Then one end of film 7 is connected to DC voltage source 3 with the other end earthed, and the terminal led out from the middle part is connected to the base electrode of Tr1. And the variable voltage, which is obtained by varying the quantity of light irradiated on the entire surface of film 8, is applied to Tr1. Thus, the transistor switching can be controlled just through variation of the quantity of light and with a simple constitution.
JP14472677A 1977-12-02 1977-12-02 Circuit to control transistor switching Pending JPS5477561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14472677A JPS5477561A (en) 1977-12-02 1977-12-02 Circuit to control transistor switching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14472677A JPS5477561A (en) 1977-12-02 1977-12-02 Circuit to control transistor switching

Publications (1)

Publication Number Publication Date
JPS5477561A true JPS5477561A (en) 1979-06-21

Family

ID=15368883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14472677A Pending JPS5477561A (en) 1977-12-02 1977-12-02 Circuit to control transistor switching

Country Status (1)

Country Link
JP (1) JPS5477561A (en)

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