JPS5776923A - Signal input circuit - Google Patents

Signal input circuit

Info

Publication number
JPS5776923A
JPS5776923A JP55151474A JP15147480A JPS5776923A JP S5776923 A JPS5776923 A JP S5776923A JP 55151474 A JP55151474 A JP 55151474A JP 15147480 A JP15147480 A JP 15147480A JP S5776923 A JPS5776923 A JP S5776923A
Authority
JP
Japan
Prior art keywords
turns
resistor
pull
inverter
output
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
JP55151474A
Other languages
Japanese (ja)
Inventor
Tsuneo Nakamura
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP55151474A priority Critical patent/JPS5776923A/en
Publication of JPS5776923A publication Critical patent/JPS5776923A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/10—Modifications for increasing the maximum permissible switched voltage
    • H03K17/102—Modifications for increasing the maximum permissible switched voltage in field-effect transistor switches
    • 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)
  • Electronic Switches (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To prevent noise induction and to reduce power consumption, by connecting an MOSFET which turns on/off by an inverter output in parallel with a pull- up(down) resistor, in an MOS inverter circuit connected with the pull-up(down) resistor for the input. CONSTITUTION:When a switch 11 turns on, an output 16 of an inverter 15 is at H level, and a P channel MOSFET turns off. In this case, a current flows via a pull- up resistor 12 and power consumption is less because a resistor 12 is high resistance. When the switch 11 turns off, the potential of an input signal line 14 is at VDD, and an MOSFET13 turns on an L level of the output 16 of the inverter 15. Taking on-resistance of the FET13 as several k ohms- several hundreds k phms, the induction of hum and noise on the input line 14 can be avoided. When a pull-down resistor 18 is used, an N channel MOSFET19 is connected in parallel.
JP55151474A 1980-10-30 1980-10-30 Signal input circuit Pending JPS5776923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55151474A JPS5776923A (en) 1980-10-30 1980-10-30 Signal input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151474A JPS5776923A (en) 1980-10-30 1980-10-30 Signal input circuit

Publications (1)

Publication Number Publication Date
JPS5776923A true JPS5776923A (en) 1982-05-14

Family

ID=15519298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151474A Pending JPS5776923A (en) 1980-10-30 1980-10-30 Signal input circuit

Country Status (1)

Country Link
JP (1) JPS5776923A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284230U (en) * 1985-11-12 1987-05-29
JPS63209221A (en) * 1987-02-25 1988-08-30 Hokuyo Automatic Co Processing circuit for contact input
JPH04334117A (en) * 1991-05-08 1992-11-20 Nec Ic Microcomput Syst Ltd Input circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284230U (en) * 1985-11-12 1987-05-29
JPS63209221A (en) * 1987-02-25 1988-08-30 Hokuyo Automatic Co Processing circuit for contact input
JPH04334117A (en) * 1991-05-08 1992-11-20 Nec Ic Microcomput Syst Ltd Input circuit

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