JPS5590135A - Driver circuit - Google Patents

Driver circuit

Info

Publication number
JPS5590135A
JPS5590135A JP16321278A JP16321278A JPS5590135A JP S5590135 A JPS5590135 A JP S5590135A JP 16321278 A JP16321278 A JP 16321278A JP 16321278 A JP16321278 A JP 16321278A JP S5590135 A JPS5590135 A JP S5590135A
Authority
JP
Japan
Prior art keywords
transistor
driver circuit
protection
emitter
substitute
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
JP16321278A
Other languages
Japanese (ja)
Inventor
Junichi Nakamura
Iwao Yamazaki
Seiji Hata
Hideyuki Tokumaru
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16321278A priority Critical patent/JPS5590135A/en
Publication of JPS5590135A publication Critical patent/JPS5590135A/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
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To increase a protection function by employing a transistor as a substitute for a clamping diode. CONSTITUTION:For example, when a voltage much higher than power source Vcc is applied to output terminal Out through the induction of a relay coil, a current flowing from the emitter to base of transistor Q3 let transistor Q3 conduct to clamp collector potentials of transistors Q1 and Q2 for protection. Consequently, the occupation area of the clamping element in IC can be reduced.
JP16321278A 1978-12-27 1978-12-27 Driver circuit Pending JPS5590135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16321278A JPS5590135A (en) 1978-12-27 1978-12-27 Driver circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16321278A JPS5590135A (en) 1978-12-27 1978-12-27 Driver circuit

Publications (1)

Publication Number Publication Date
JPS5590135A true JPS5590135A (en) 1980-07-08

Family

ID=15769419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16321278A Pending JPS5590135A (en) 1978-12-27 1978-12-27 Driver circuit

Country Status (1)

Country Link
JP (1) JPS5590135A (en)

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