JPS57113625A - Input circuit - Google Patents

Input circuit

Info

Publication number
JPS57113625A
JPS57113625A JP55188215A JP18821580A JPS57113625A JP S57113625 A JPS57113625 A JP S57113625A JP 55188215 A JP55188215 A JP 55188215A JP 18821580 A JP18821580 A JP 18821580A JP S57113625 A JPS57113625 A JP S57113625A
Authority
JP
Japan
Prior art keywords
signal
capacitor
output
open
potential
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
JP55188215A
Other languages
Japanese (ja)
Inventor
Yoichi Miyagawa
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 JP55188215A priority Critical patent/JPS57113625A/en
Publication of JPS57113625A publication Critical patent/JPS57113625A/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
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
    • H03K17/6872—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor using complementary field-effect transistors

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
  • Calculators And Similar Devices (AREA)

Abstract

PURPOSE:To reduce current through the operation that no current flows at open input terminal in open and high states of input conditions and only current depending on a capacitor and a detected frequency flows even when setting said condition to a high state. CONSTITUTION:When a control signal 11 is at high (H) state and a signal 12 is at low (L) state at a period t3, the potential of a capacitor is at H. When the signal 11 is at L, signal 12 is at L, a signal 13 is at H and a clock signal 16 is at L at t4, a switch circuit 8 and a transistor (TR)10 turn off, the potential of the capacitor 9 is at H, and the output of a clock control type inverter 17 is at L. Even when an input terminal 6 is open at t5, the potential of the capacitor 9 is kept H, and a Q output of an FF19 is at L. The signal 11 is at L, signal 12 is at L, signal 13 is at H and the signal 16 is at L at t8, the inverter 17 is operative and the output is at H. When the signal 11 is at H, signals 12, 13 are at L and the signal 16 is at H, at t9, the Q output of the FF19 is at H. Thereafter, since the input terminal 6 is open, V9 approaches L.
JP55188215A 1980-12-29 1980-12-29 Input circuit Pending JPS57113625A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55188215A JPS57113625A (en) 1980-12-29 1980-12-29 Input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188215A JPS57113625A (en) 1980-12-29 1980-12-29 Input circuit

Publications (1)

Publication Number Publication Date
JPS57113625A true JPS57113625A (en) 1982-07-15

Family

ID=16219778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55188215A Pending JPS57113625A (en) 1980-12-29 1980-12-29 Input circuit

Country Status (1)

Country Link
JP (1) JPS57113625A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63253718A (en) * 1987-04-09 1988-10-20 Rohm Co Ltd Gate circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5051659A (en) * 1973-09-07 1975-05-08
JPS5326562A (en) * 1976-08-25 1978-03-11 Hitachi Ltd Gate circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5051659A (en) * 1973-09-07 1975-05-08
JPS5326562A (en) * 1976-08-25 1978-03-11 Hitachi Ltd Gate circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63253718A (en) * 1987-04-09 1988-10-20 Rohm Co Ltd Gate circuit
JPH0563050B2 (en) * 1987-04-09 1993-09-09 Rohm Kk

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