JPS57147328A - Input circuit - Google Patents

Input circuit

Info

Publication number
JPS57147328A
JPS57147328A JP56031696A JP3169681A JPS57147328A JP S57147328 A JPS57147328 A JP S57147328A JP 56031696 A JP56031696 A JP 56031696A JP 3169681 A JP3169681 A JP 3169681A JP S57147328 A JPS57147328 A JP S57147328A
Authority
JP
Japan
Prior art keywords
inverter
input
output
source
bias
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.)
Granted
Application number
JP56031696A
Other languages
Japanese (ja)
Other versions
JPH038126B2 (en
Inventor
Masanori Ariga
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 JP56031696A priority Critical patent/JPS57147328A/en
Publication of JPS57147328A publication Critical patent/JPS57147328A/en
Publication of JPH038126B2 publication Critical patent/JPH038126B2/ja
Granted 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
    • H03K17/13—Modifications for switching at zero crossing

Landscapes

  • Manipulation Of Pulses (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To increase input impedance during direct driving by cutting off a bias for zero-cross point detection applied to the input of an inverter when the inverter is driven directly. CONSTITUTION:When an AC source is connected to an input terminal IN, the output of a flip-flop F/F has a level ''1'', and a switch element SW1 turns on. Therefore, a bias at a switching point is applied to the input of an inverter I1 by an inverter I2, and the output of the inverter I1 is inverted at the zero-cross point of the AC source. When a digital source is connected directly to the input terminal IN, the output of the F/F has a level ''0'' and the switch element SW1 turns off. Thus, the impedance of the input element IN increases.
JP56031696A 1981-03-05 1981-03-05 Input circuit Granted JPS57147328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56031696A JPS57147328A (en) 1981-03-05 1981-03-05 Input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56031696A JPS57147328A (en) 1981-03-05 1981-03-05 Input circuit

Publications (2)

Publication Number Publication Date
JPS57147328A true JPS57147328A (en) 1982-09-11
JPH038126B2 JPH038126B2 (en) 1991-02-05

Family

ID=12338234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56031696A Granted JPS57147328A (en) 1981-03-05 1981-03-05 Input circuit

Country Status (1)

Country Link
JP (1) JPS57147328A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59135922A (en) * 1983-01-25 1984-08-04 Sharp Corp Shaping circuit of zero cross waveform
JPS60105320A (en) * 1983-11-14 1985-06-10 Nippon Telegr & Teleph Corp <Ntt> Level converting circuit
JPS6486612A (en) * 1987-09-28 1989-03-31 Nec Corp Microcomputer
JPH01169823U (en) * 1988-05-19 1989-11-30
JPH074990U (en) * 1993-06-10 1995-01-24 旺松 陳 Hose fittings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59135922A (en) * 1983-01-25 1984-08-04 Sharp Corp Shaping circuit of zero cross waveform
JPH0351136B2 (en) * 1983-01-25 1991-08-05 Sharp Kk
JPS60105320A (en) * 1983-11-14 1985-06-10 Nippon Telegr & Teleph Corp <Ntt> Level converting circuit
JPS6486612A (en) * 1987-09-28 1989-03-31 Nec Corp Microcomputer
JPH01169823U (en) * 1988-05-19 1989-11-30
JPH074990U (en) * 1993-06-10 1995-01-24 旺松 陳 Hose fittings

Also Published As

Publication number Publication date
JPH038126B2 (en) 1991-02-05

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