JPS57210726A - Driver circuit - Google Patents

Driver circuit

Info

Publication number
JPS57210726A
JPS57210726A JP56095305A JP9530581A JPS57210726A JP S57210726 A JPS57210726 A JP S57210726A JP 56095305 A JP56095305 A JP 56095305A JP 9530581 A JP9530581 A JP 9530581A JP S57210726 A JPS57210726 A JP S57210726A
Authority
JP
Japan
Prior art keywords
collector
trs
emitter
load
resistors
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.)
Granted
Application number
JP56095305A
Other languages
Japanese (ja)
Other versions
JPH0216060B2 (en
Inventor
Akira Yamagiwa
Takashi Matsumoto
Ryozo Yoshino
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 JP56095305A priority Critical patent/JPS57210726A/en
Publication of JPS57210726A publication Critical patent/JPS57210726A/en
Publication of JPH0216060B2 publication Critical patent/JPH0216060B2/ja
Granted 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
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors

Landscapes

  • Logic Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To switch an output impedance, by constituting a collector resistor of one of a pair of transistors (TRs) driving a load with pulse through resistors in parallel connection and inserting a switching element to one of the resistors. CONSTITUTION:TRs 10 and 11 constitute a current switching circuit, the emitter is connected in common to the collector of a TR13, and the base is connected to an output of different phase of a predriver circuit 12, and a current can alternately flow by inputting a pulse to the circuit 12. The TR13 constitute a constant current source with an operational amplifier 14. The collector of the TRs 10 and 11 is connected to the emitter of a TR16 via resistors R15 and 18, and a series circuit consisting of an R19, a distributed constant line 20 and a relay 21 is connected between the collector of the TR10 and the emitter of the TR16. The TR16 constitutes a constant voltage source with an operational amplifier 17. A load 24 is connected to an output point 22 via a distributed constant line 23. A load with different impedance can be driven by switching the relay 21.
JP56095305A 1981-06-22 1981-06-22 Driver circuit Granted JPS57210726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56095305A JPS57210726A (en) 1981-06-22 1981-06-22 Driver circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095305A JPS57210726A (en) 1981-06-22 1981-06-22 Driver circuit

Publications (2)

Publication Number Publication Date
JPS57210726A true JPS57210726A (en) 1982-12-24
JPH0216060B2 JPH0216060B2 (en) 1990-04-16

Family

ID=14134048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095305A Granted JPS57210726A (en) 1981-06-22 1981-06-22 Driver circuit

Country Status (1)

Country Link
JP (1) JPS57210726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010918A (en) * 1983-06-30 1985-01-21 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Current switch logic circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107248A (en) * 1977-03-01 1978-09-19 Nec Corp Input-output coupled circuit of digital logic circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107248A (en) * 1977-03-01 1978-09-19 Nec Corp Input-output coupled circuit of digital logic circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010918A (en) * 1983-06-30 1985-01-21 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Current switch logic circuit

Also Published As

Publication number Publication date
JPH0216060B2 (en) 1990-04-16

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