JPS5797725A - Logical operation circuit - Google Patents

Logical operation circuit

Info

Publication number
JPS5797725A
JPS5797725A JP55174211A JP17421180A JPS5797725A JP S5797725 A JPS5797725 A JP S5797725A JP 55174211 A JP55174211 A JP 55174211A JP 17421180 A JP17421180 A JP 17421180A JP S5797725 A JPS5797725 A JP S5797725A
Authority
JP
Japan
Prior art keywords
potential
turned
output
input
trq1
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
JP55174211A
Other languages
Japanese (ja)
Inventor
Tadashi Aoki
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 JP55174211A priority Critical patent/JPS5797725A/en
Publication of JPS5797725A publication Critical patent/JPS5797725A/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
    • H03K19/01—Modifications for accelerating switching
    • H03K19/013—Modifications for accelerating switching in bipolar transistor circuits
    • H03K19/0136—Modifications for accelerating switching in bipolar transistor circuits by means of a pull-up or down element
    • 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
    • H03K19/0008—Arrangements for reducing power consumption
    • H03K19/001—Arrangements for reducing power consumption in bipolar transistor circuits

Landscapes

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

Abstract

PURPOSE:To reduce the power consumption, by short-circuiting the base of an output transistor to the earth potential when the emitter potential of an input transistor of a buffer circuit becomes a constant voltage or more in the logical operation circuit provided with the off buffer circuit. CONSTITUTION:When an input I is low-level, an input transistor TRQ1 and an output TRQ4 are turned off, and TRs Q2 and Q6 are turned off, and the circuit between the base of the output TRQ4 and the earth is low-impedance. When the input I is changed to a high potential under this state, the TRQ1 is turned on, and the collector potential falls up to such potential that the TRQ6 is held in the turning-on state, and an output terminal O becomes the earth potential, and the output TRQ4 is turned off. When the potential of the input I is raised furthermore, the collector potential of the TRQ1 becomes low, and no current is flowed from the off buffer circuit of TRs Q2 and Q3, and the on-off current is not flowed. At this time, the collector potential of the TRQ1 is low, and the TRQ6 is turned off.
JP55174211A 1980-12-10 1980-12-10 Logical operation circuit Pending JPS5797725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55174211A JPS5797725A (en) 1980-12-10 1980-12-10 Logical operation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55174211A JPS5797725A (en) 1980-12-10 1980-12-10 Logical operation circuit

Publications (1)

Publication Number Publication Date
JPS5797725A true JPS5797725A (en) 1982-06-17

Family

ID=15974660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55174211A Pending JPS5797725A (en) 1980-12-10 1980-12-10 Logical operation circuit

Country Status (1)

Country Link
JP (1) JPS5797725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593210A (en) * 1983-08-01 1986-06-03 Signetics Corporation Switching circuit with active pull-off

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593210A (en) * 1983-08-01 1986-06-03 Signetics Corporation Switching circuit with active pull-off

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