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JPS5717233A - Input circuit - Google Patents

Input circuit

Info

Publication number
JPS5717233A
JPS5717233A JP9249780A JP9249780A JPS5717233A JP S5717233 A JPS5717233 A JP S5717233A JP 9249780 A JP9249780 A JP 9249780A JP 9249780 A JP9249780 A JP 9249780A JP S5717233 A JPS5717233 A JP S5717233A
Authority
JP
Japan
Prior art keywords
potential
base
emitter
collector
vbe
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
JP9249780A
Other languages
Japanese (ja)
Inventor
Shinji Saito
Taaki Ichise
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9249780A priority Critical patent/JPS5717233A/en
Publication of JPS5717233A publication Critical patent/JPS5717233A/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

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)

Abstract

PURPOSE:To increase the switching speed, by providing a means producing a fixed potential between the emitter of the 2nd transistor (TR) of npn type in which a load element is inserted to the collector of the 1st TR of npn type taking the emitter as the input terminal through the short circuit of base and collector, and the reference potential. CONSTITUTION:When an input signal In is at a low potential V1L, since a current flows to the emitter of a TR21 via a load resistor 22, the base potential of the TR21 is at V1L+VBE. On the other hand, when the input signal In is at a high potential V1H, the base potential of the TR21 is at V1H+VBE. Since the TR12 is not conductive, if the base potential is not more than the VB+VBE, where the VB is the output voltage of a constant voltage power supply 23, the switching control of the TR12 can be made, by setting the VB to a value within the V1L and V1H. Since the base and collector of the TR21 is shorted and the voltage between the collector and the emitter is not zero, the TR21 is not in saturation operation.
JP9249780A 1980-07-07 1980-07-07 Input circuit Pending JPS5717233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9249780A JPS5717233A (en) 1980-07-07 1980-07-07 Input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9249780A JPS5717233A (en) 1980-07-07 1980-07-07 Input circuit

Publications (1)

Publication Number Publication Date
JPS5717233A true JPS5717233A (en) 1982-01-28

Family

ID=14055931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9249780A Pending JPS5717233A (en) 1980-07-07 1980-07-07 Input circuit

Country Status (1)

Country Link
JP (1) JPS5717233A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336765U (en) * 1986-08-26 1988-03-09
US4993615A (en) * 1987-01-12 1991-02-19 Industri Ab Thule Anchorage device
JPH05304576A (en) * 1991-12-07 1993-11-16 Mita Ind Co Ltd Image forming device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336765U (en) * 1986-08-26 1988-03-09
US4993615A (en) * 1987-01-12 1991-02-19 Industri Ab Thule Anchorage device
JPH05304576A (en) * 1991-12-07 1993-11-16 Mita Ind Co Ltd Image forming device

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