JPS57192135A - Current switching type logical circuit - Google Patents

Current switching type logical circuit

Info

Publication number
JPS57192135A
JPS57192135A JP7593581A JP7593581A JPS57192135A JP S57192135 A JPS57192135 A JP S57192135A JP 7593581 A JP7593581 A JP 7593581A JP 7593581 A JP7593581 A JP 7593581A JP S57192135 A JPS57192135 A JP S57192135A
Authority
JP
Japan
Prior art keywords
circuit
current
trs
circuits
resistor
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
JP7593581A
Other languages
Japanese (ja)
Inventor
Hiroyuki Matsuo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7593581A priority Critical patent/JPS57192135A/en
Publication of JPS57192135A publication Critical patent/JPS57192135A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
    • H03K19/082—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using bipolar transistors
    • H03K19/086—Emitter coupled logic

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To eliminate the need for mounting of a termination resistor and a pull-down resistor and the like, to hold high-speed circuit and to achieve low power consumption, by connecting a constant current circuit in series with an emitter of an emitter follower at an output stage and controlling the current of the constant current circuit with a control means. CONSTITUTION:To an emitter of an emitter follower of a current switching type logical circuit having the emitter follower at the output stage, constant current circuits 49' and 50' consisting of a transistor TR59, a resistor 61, a TR60 and a resistor 62' respectively are connected. A controlling constant voltage is applied to the base of the TRs 59 and 60 of the circuits 49' and 50' from a constant voltage circuit consisting of resistors 63, 65 and 64, 66, and the TRs 59 and 60 are on/off-controlled with the control from control terminals 57 and 58. A current flows to the circuits 49' and 50' by turning off the TRs 59 and 60 when the terminals 57 and 58 are grounded and the current of the circuits 49' and 50' is interrupted by turning off the TRs 59 and 60 when the terminals 57 and 58 are opened, to keep the high speed of the circuit and to achieve low power consumption.
JP7593581A 1981-05-20 1981-05-20 Current switching type logical circuit Pending JPS57192135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7593581A JPS57192135A (en) 1981-05-20 1981-05-20 Current switching type logical circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7593581A JPS57192135A (en) 1981-05-20 1981-05-20 Current switching type logical circuit

Publications (1)

Publication Number Publication Date
JPS57192135A true JPS57192135A (en) 1982-11-26

Family

ID=13590602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7593581A Pending JPS57192135A (en) 1981-05-20 1981-05-20 Current switching type logical circuit

Country Status (1)

Country Link
JP (1) JPS57192135A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629812A (en) * 1992-07-09 1994-02-04 Toshiba Corp Potential data selection circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116767A (en) * 1977-03-22 1978-10-12 Nec Corp Emitter follower output circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116767A (en) * 1977-03-22 1978-10-12 Nec Corp Emitter follower output circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629812A (en) * 1992-07-09 1994-02-04 Toshiba Corp Potential data selection circuit

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