JPS57122667A - Thyristor control circuit - Google Patents

Thyristor control circuit

Info

Publication number
JPS57122667A
JPS57122667A JP20038381A JP20038381A JPS57122667A JP S57122667 A JPS57122667 A JP S57122667A JP 20038381 A JP20038381 A JP 20038381A JP 20038381 A JP20038381 A JP 20038381A JP S57122667 A JPS57122667 A JP S57122667A
Authority
JP
Japan
Prior art keywords
transistor
emitter
base
control
diffusion layer
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
JP20038381A
Other languages
Japanese (ja)
Inventor
Kazuo Takasugi
Ryoichi Fujimoto
Takashi Takeuchi
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 JP20038381A priority Critical patent/JPS57122667A/en
Publication of JPS57122667A publication Critical patent/JPS57122667A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Thyristor Switches And Gates (AREA)
  • Power Conversion In General (AREA)

Abstract

PURPOSE:To simplify the outside circuit by a method wherein a transistor is formed in a control IC and used as a negative voltage blocking means and also used as a transistor. CONSTITUTION:A substrate type PnP transistor 41 is formed in a control IC 4 and driven by a control transistor 42. The base 43, the collector 44 and the emitter 45 of the transistor 41 are made of n-epitaxial layer, P type substrate and P type base diffusion layer respectively. Accordingly, the reverse bias is applied to the junction of the base 43 of the epitaxial layer and the emitter 45 of the base diffusion layer when the potential of the emitter 45 becomes negative. The withstand voltage of the junction of the epitaxial layer and the base diffusion layer is higher than that of the emitter of the usual transistor, so that this transistor 41 can also be utilized as a reverse voltage blocking diode without further special treatment.
JP20038381A 1981-12-11 1981-12-11 Thyristor control circuit Pending JPS57122667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20038381A JPS57122667A (en) 1981-12-11 1981-12-11 Thyristor control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20038381A JPS57122667A (en) 1981-12-11 1981-12-11 Thyristor control circuit

Publications (1)

Publication Number Publication Date
JPS57122667A true JPS57122667A (en) 1982-07-30

Family

ID=16423401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20038381A Pending JPS57122667A (en) 1981-12-11 1981-12-11 Thyristor control circuit

Country Status (1)

Country Link
JP (1) JPS57122667A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236625A (en) * 1990-02-14 1991-10-22 Hitachi Ltd Drive circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825061U (en) * 1971-08-02 1973-03-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825061U (en) * 1971-08-02 1973-03-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236625A (en) * 1990-02-14 1991-10-22 Hitachi Ltd Drive circuit

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