JPS54129864A - Fast logic circuit - Google Patents

Fast logic circuit

Info

Publication number
JPS54129864A
JPS54129864A JP3749378A JP3749378A JPS54129864A JP S54129864 A JPS54129864 A JP S54129864A JP 3749378 A JP3749378 A JP 3749378A JP 3749378 A JP3749378 A JP 3749378A JP S54129864 A JPS54129864 A JP S54129864A
Authority
JP
Japan
Prior art keywords
electrodes
switch
input
level
logic 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
JP3749378A
Other languages
Japanese (ja)
Inventor
Masaaki Kanda
Takeshi Murakami
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 JP3749378A priority Critical patent/JPS54129864A/en
Publication of JPS54129864A publication Critical patent/JPS54129864A/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
    • H03K19/088—Transistor-transistor 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 establish the fast logic circuit having less power consumption with less input current, by providing a switch at the input gate circuit. CONSTITUTION:When the input electrodes 1 and 2 are both at high level, the level of the output electrode 3 is 0 with positive logic, and when at least one of the electrodes 1, 2 is at low level, and the level of the electrode 3 is 1. In such a fast logic circuit, the resistors 14 and 15 are connected in series between the base of the input transistor Tr9 and the power supply electrode 4, and the switch 16 is connected in parallel with the resistor 15 having greater resistance value. Further, the switch 16 is conductive when the electrodes 1 and 2 are both at high level, and the base current of the current drive Tr10 is a greater value wih the control of only resistor 14, sufficiently driving Tr10 and output Tr12. Further, when at least one of the electrodes 1 and 2 is at low level, the switch 16 is cut off to cause in series connection for the resistors 14 and 15. The input current is limited and the number of inputs (loads) connectable to the one output electrode can be increased.
JP3749378A 1978-03-30 1978-03-30 Fast logic circuit Pending JPS54129864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3749378A JPS54129864A (en) 1978-03-30 1978-03-30 Fast logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3749378A JPS54129864A (en) 1978-03-30 1978-03-30 Fast logic circuit

Publications (1)

Publication Number Publication Date
JPS54129864A true JPS54129864A (en) 1979-10-08

Family

ID=12499040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3749378A Pending JPS54129864A (en) 1978-03-30 1978-03-30 Fast logic circuit

Country Status (1)

Country Link
JP (1) JPS54129864A (en)

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