JPS57168523A - Contact input circuit - Google Patents

Contact input circuit

Info

Publication number
JPS57168523A
JPS57168523A JP5303881A JP5303881A JPS57168523A JP S57168523 A JPS57168523 A JP S57168523A JP 5303881 A JP5303881 A JP 5303881A JP 5303881 A JP5303881 A JP 5303881A JP S57168523 A JPS57168523 A JP S57168523A
Authority
JP
Japan
Prior art keywords
switch
current
contact
logical signal
terminal
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
JP5303881A
Other languages
Japanese (ja)
Inventor
Tomio Kato
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.)
Fuji Electric Co Ltd
Fuji Facom Corp
Original Assignee
Fuji Electric Co Ltd
Fuji Facom Corp
Fuji Electric Manufacturing 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 Fuji Electric Co Ltd, Fuji Facom Corp, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP5303881A priority Critical patent/JPS57168523A/en
Publication of JPS57168523A publication Critical patent/JPS57168523A/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
    • H03K19/0008—Arrangements for reducing power consumption

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)

Abstract

PURPOSE:To reduce the power consumption, by supplying a sufficient amount of voltage and current to a contact until a logical signal is set up and then limiting the current in the subsequent state of a closed circuit. CONSTITUTION:A resistance 10 and a switch 8 are set in parallel in a voltage/ current supply circuit 12c and then connected in parallel to a resistance 2. The switching control of a switch 8 is carried out by feeding back the logical signal supplied from an output terminal 5. The logical signal is set at 0 at the terminal 5 with the switch 8 closed in the period during which a contact has the chattering and its subsequent time which is shorter than the time constant of a filter 3. As a result, the transient current I0 flows to the contact 1. When the time constant of the filter 3 elapses, the closed state of the contact 1 is perfectly converted into 1 of a logical signal at the terminal 5 to open the switch 8. When the switch 8 is opened, the contact current is supplied through resistances 2 and 10. And the current value I1 is sufficiently reduced.
JP5303881A 1981-04-10 1981-04-10 Contact input circuit Pending JPS57168523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5303881A JPS57168523A (en) 1981-04-10 1981-04-10 Contact input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5303881A JPS57168523A (en) 1981-04-10 1981-04-10 Contact input circuit

Publications (1)

Publication Number Publication Date
JPS57168523A true JPS57168523A (en) 1982-10-16

Family

ID=12931711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5303881A Pending JPS57168523A (en) 1981-04-10 1981-04-10 Contact input circuit

Country Status (1)

Country Link
JP (1) JPS57168523A (en)

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