JPS5634229A - Logical operation circuit - Google Patents

Logical operation circuit

Info

Publication number
JPS5634229A
JPS5634229A JP11007479A JP11007479A JPS5634229A JP S5634229 A JPS5634229 A JP S5634229A JP 11007479 A JP11007479 A JP 11007479A JP 11007479 A JP11007479 A JP 11007479A JP S5634229 A JPS5634229 A JP S5634229A
Authority
JP
Japan
Prior art keywords
base
output
inverter
trq3
trq2
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
JP11007479A
Other languages
Japanese (ja)
Other versions
JPS5953729B2 (en
Inventor
Hitoshi Omichi
Hiroshi Enomoto
Yasushi Yasuda
Katsuharu Mitono
Taketo Imaizumi
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 JP54110074A priority Critical patent/JPS5953729B2/en
Priority to US06/180,452 priority patent/US4449063A/en
Priority to DE8080302980T priority patent/DE3071720D1/en
Priority to EP80302980A priority patent/EP0026051B1/en
Publication of JPS5634229A publication Critical patent/JPS5634229A/en
Publication of JPS5953729B2 publication Critical patent/JPS5953729B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To shorten the turning-off time to make a high-speed operation possible, by providing a transistor for charge emission between the base of the inverter transistor in the output stage and the ground and by discharging rapidly base storage charge of the output inverter transistor at a turning-off time. CONSTITUTION:NPN transistor TrQ2 of an emitter follower and NPN inverter TrQ3 driven by the emitter output of TrQ2 are provided, and further, TrQ4-Q7 are provided which are driven by the collector output of TrQ2 and constitute a totem pole output stage together with TrQ3, thereby forming a logical operation circuit. NPN switching TrQ6 which emits charge of the base is provided between the base of inverter TrQ3 and the ground in this constitution, and NPN TrQ7 is connected between the base of TrQ6 and the collector of TrQ2, and the base of TrQ7 is connected to the emiter of TrQ5 of the output stage; and when inverter TrQ3 is switched from turning-off to turning-on, a part of the transient base current of output-stage TrQ5 is flowed to TrQ6 to make a high-speed operation possible.
JP54110074A 1979-08-29 1979-08-29 logic circuit Expired JPS5953729B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP54110074A JPS5953729B2 (en) 1979-08-29 1979-08-29 logic circuit
US06/180,452 US4449063A (en) 1979-08-29 1980-08-22 Logic circuit with improved switching
DE8080302980T DE3071720D1 (en) 1979-08-29 1980-08-28 A fundamental logic circuit
EP80302980A EP0026051B1 (en) 1979-08-29 1980-08-28 A fundamental logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54110074A JPS5953729B2 (en) 1979-08-29 1979-08-29 logic circuit

Publications (2)

Publication Number Publication Date
JPS5634229A true JPS5634229A (en) 1981-04-06
JPS5953729B2 JPS5953729B2 (en) 1984-12-26

Family

ID=14526373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54110074A Expired JPS5953729B2 (en) 1979-08-29 1979-08-29 logic circuit

Country Status (1)

Country Link
JP (1) JPS5953729B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504744A (en) * 1983-01-13 1985-03-12 National Semiconductor Corporation Schottky TTL integrated logic gate circuit with reduced speed power product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504744A (en) * 1983-01-13 1985-03-12 National Semiconductor Corporation Schottky TTL integrated logic gate circuit with reduced speed power product

Also Published As

Publication number Publication date
JPS5953729B2 (en) 1984-12-26

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