JPS5737930A - Logical circuit - Google Patents

Logical circuit

Info

Publication number
JPS5737930A
JPS5737930A JP11143980A JP11143980A JPS5737930A JP S5737930 A JPS5737930 A JP S5737930A JP 11143980 A JP11143980 A JP 11143980A JP 11143980 A JP11143980 A JP 11143980A JP S5737930 A JPS5737930 A JP S5737930A
Authority
JP
Japan
Prior art keywords
circuit
output
pull
constant
logical circuit
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
JP11143980A
Other languages
Japanese (ja)
Inventor
Hideo Matsui
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11143980A priority Critical patent/JPS5737930A/en
Publication of JPS5737930A publication Critical patent/JPS5737930A/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
    • H03K19/017—Modifications for accelerating switching in field-effect transistor circuits
    • H03K19/01707—Modifications for accelerating switching in field-effect transistor circuits in asynchronous circuits
    • H03K19/01721—Modifications for accelerating switching in field-effect transistor circuits in asynchronous circuits by means of a pull-up or down element

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 make constant the output waveform and to reduce the dispersion in switching time at trailing, by providing a pull-down circuit by-passing a prescribed amount of an output current, when an output is at high level to an output circuit. CONSTITUTION:A circuit such as a pull-down circuit 12 consisting of diodes and a transistor (TR), or a resistor 10 or a diode group 11 is connected between an output terminal 9 of a TTL logical circuit and a ground terminal 3. Thus, a current flowing out from the TR and the diodes 8 of the logical circuit can flow to the pull-down circuit for a prescribed amount, and since the effect of fluctuation of an external load is mitigated, the output waveform can be made further constant, the trailing time can be made constant, the dispersion in the switching time can be reduced and a circuit with high timing accuracy can be obtained.
JP11143980A 1980-08-13 1980-08-13 Logical circuit Pending JPS5737930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11143980A JPS5737930A (en) 1980-08-13 1980-08-13 Logical circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11143980A JPS5737930A (en) 1980-08-13 1980-08-13 Logical circuit

Publications (1)

Publication Number Publication Date
JPS5737930A true JPS5737930A (en) 1982-03-02

Family

ID=14561222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11143980A Pending JPS5737930A (en) 1980-08-13 1980-08-13 Logical circuit

Country Status (1)

Country Link
JP (1) JPS5737930A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825108A (en) * 1987-06-15 1989-04-25 North American Philips Corporation, Signetics Division Voltage translator with restricted output voltage swing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52137246A (en) * 1976-05-12 1977-11-16 Fujitsu Ltd Transistor transistor logic circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52137246A (en) * 1976-05-12 1977-11-16 Fujitsu Ltd Transistor transistor logic circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825108A (en) * 1987-06-15 1989-04-25 North American Philips Corporation, Signetics Division Voltage translator with restricted output voltage swing

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