JPS56137729A - Insulation type transistor driving circuit - Google Patents

Insulation type transistor driving circuit

Info

Publication number
JPS56137729A
JPS56137729A JP4035380A JP4035380A JPS56137729A JP S56137729 A JPS56137729 A JP S56137729A JP 4035380 A JP4035380 A JP 4035380A JP 4035380 A JP4035380 A JP 4035380A JP S56137729 A JPS56137729 A JP S56137729A
Authority
JP
Japan
Prior art keywords
turns
output transistor
led11
base
driving circuit
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
JP4035380A
Other languages
Japanese (ja)
Inventor
Masayoshi Maeda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4035380A priority Critical patent/JPS56137729A/en
Publication of JPS56137729A publication Critical patent/JPS56137729A/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
    • H03K17/51—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

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To insulate electrically the output transistor of an isolator from an output transistor controlling part, by using a DC/DC converter for a control power source which supplies electric power to a pin photodiode and the output transistor. CONSTITUTION:Light emitting LED11 turns of when input (a)10 to inverter 7 is at the high level and turns off when at the low level. The output light of LED11 is photodetected by pin photodiode 12. Then, a current flows to the base of output transistor TR13 of the isolator to turn on TR13. As LED11 turns off, the resistance value of diode 12 becomes infinite and the base current of TR13 is ceased, turning off TR13. Therefore, a base current is supplied from DC/DC converter 1 to the base of TR8 via resistance 4 and 8. Thus, TR8 turns on.
JP4035380A 1980-03-31 1980-03-31 Insulation type transistor driving circuit Pending JPS56137729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4035380A JPS56137729A (en) 1980-03-31 1980-03-31 Insulation type transistor driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4035380A JPS56137729A (en) 1980-03-31 1980-03-31 Insulation type transistor driving circuit

Publications (1)

Publication Number Publication Date
JPS56137729A true JPS56137729A (en) 1981-10-27

Family

ID=12578259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4035380A Pending JPS56137729A (en) 1980-03-31 1980-03-31 Insulation type transistor driving circuit

Country Status (1)

Country Link
JP (1) JPS56137729A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340460A (en) * 1991-03-15 1993-12-21 T H K Kk Ball screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340460A (en) * 1991-03-15 1993-12-21 T H K Kk Ball screw

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