JPS5689130A - Electronic circuit - Google Patents

Electronic circuit

Info

Publication number
JPS5689130A
JPS5689130A JP16721779A JP16721779A JPS5689130A JP S5689130 A JPS5689130 A JP S5689130A JP 16721779 A JP16721779 A JP 16721779A JP 16721779 A JP16721779 A JP 16721779A JP S5689130 A JPS5689130 A JP S5689130A
Authority
JP
Japan
Prior art keywords
level
change
emitter
emitter follower
trq4
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
JP16721779A
Other languages
Japanese (ja)
Inventor
Yasunori Kanai
Mitsuhisa Shimizu
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 JP16721779A priority Critical patent/JPS5689130A/en
Publication of JPS5689130A publication Critical patent/JPS5689130A/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
    • H03K17/04—Modifications for accelerating switching

Abstract

PURPOSE:To improve load capacity dependency for change from the H level to the L level, by providing the second emitter follower output transistor having the polarity opposite to that of the first emitter follower output transistor. CONSTITUTION:The second emitter follower transistor TRQ4 is provided to which the base and the collector of emitter follower transistor TRQ3 are connected in common. Diode D1 for level conversion is connected to the emitter of TRQ4, and constant current source I2' is connected between diode D1 and power source VEE, and TRQ5 which has the base connected to connection point A is provided. When TRQ1 changes from turn-off to turn-on, bases of TRs Q3 and Q4 change from the H level to the L level, and according to this change, the emitter of TRQ4 and point A change from the H level to the L level rapidly.
JP16721779A 1979-12-22 1979-12-22 Electronic circuit Pending JPS5689130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16721779A JPS5689130A (en) 1979-12-22 1979-12-22 Electronic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16721779A JPS5689130A (en) 1979-12-22 1979-12-22 Electronic circuit

Publications (1)

Publication Number Publication Date
JPS5689130A true JPS5689130A (en) 1981-07-20

Family

ID=15845596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16721779A Pending JPS5689130A (en) 1979-12-22 1979-12-22 Electronic circuit

Country Status (1)

Country Link
JP (1) JPS5689130A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167542A1 (en) * 1983-12-22 1986-01-15 Advanced Micro Devices, Inc. Transient active pull-down
JPS61202519A (en) * 1985-03-06 1986-09-08 Fujitsu Ltd Comparator circuit
JPS6378615A (en) * 1986-09-22 1988-04-08 Mitsubishi Electric Corp Driving circuit for light emitting element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167542A1 (en) * 1983-12-22 1986-01-15 Advanced Micro Devices, Inc. Transient active pull-down
JPS61202519A (en) * 1985-03-06 1986-09-08 Fujitsu Ltd Comparator circuit
JPH0462494B2 (en) * 1985-03-06 1992-10-06 Fujitsu Ltd
JPS6378615A (en) * 1986-09-22 1988-04-08 Mitsubishi Electric Corp Driving circuit for light emitting element

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