JPS5741730A - Digital input circuit - Google Patents

Digital input circuit

Info

Publication number
JPS5741730A
JPS5741730A JP55119604A JP11960480A JPS5741730A JP S5741730 A JPS5741730 A JP S5741730A JP 55119604 A JP55119604 A JP 55119604A JP 11960480 A JP11960480 A JP 11960480A JP S5741730 A JPS5741730 A JP S5741730A
Authority
JP
Japan
Prior art keywords
coupler
circuit
contact
current
power source
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
JP55119604A
Other languages
Japanese (ja)
Other versions
JPH0132522B2 (en
Inventor
Noritaka Egami
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55119604A priority Critical patent/JPS5741730A/en
Publication of JPS5741730A publication Critical patent/JPS5741730A/en
Publication of JPH0132522B2 publication Critical patent/JPH0132522B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • 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
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Control By Computers (AREA)

Abstract

PURPOSE:To reduce the floating capacity, BY using an AC power source in common to each of the contacts and then applying the full wave rectified DC voltage to each contact. CONSTITUTION:When a contact 3 is open, no current flows to a photocoupler 9 and the output of the coupler 9 is set at a high level. While if the contact 3 is closed, the current of a rectifying circuit 5 flows to the coupler 9 through a smoothing circuit 6 and a resistance 7. Thus the output terminal of the circuit 5 is set at a low level. Now if the capacity of a capacitor C in the circuit 6 is set at zero, the current is supplied to the coupler 9. In other words, the adverse effect due to floating capacity 4 can be eliminated without using a DC power source but by selecting properly the receiving elements at the side of the resistance 7, the coupler 9 and processors, respectively.
JP55119604A 1980-08-26 1980-08-26 Digital input circuit Granted JPS5741730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55119604A JPS5741730A (en) 1980-08-26 1980-08-26 Digital input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55119604A JPS5741730A (en) 1980-08-26 1980-08-26 Digital input circuit

Publications (2)

Publication Number Publication Date
JPS5741730A true JPS5741730A (en) 1982-03-09
JPH0132522B2 JPH0132522B2 (en) 1989-07-05

Family

ID=14765500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55119604A Granted JPS5741730A (en) 1980-08-26 1980-08-26 Digital input circuit

Country Status (1)

Country Link
JP (1) JPS5741730A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10368070B2 (en) 2010-12-09 2019-07-30 Velos Media, Llc Image processing device and image processing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514018U (en) * 1974-06-25 1976-01-13
JPS5566012A (en) * 1978-11-09 1980-05-19 Fuji Electric Co Ltd Input signal circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514018U (en) * 1974-06-25 1976-01-13
JPS5566012A (en) * 1978-11-09 1980-05-19 Fuji Electric Co Ltd Input signal circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10368070B2 (en) 2010-12-09 2019-07-30 Velos Media, Llc Image processing device and image processing method
US10499057B2 (en) 2010-12-09 2019-12-03 Velos Media, Llc Image processing device and image processing method

Also Published As

Publication number Publication date
JPH0132522B2 (en) 1989-07-05

Similar Documents

Publication Publication Date Title
JPS5741730A (en) Digital input circuit
JPS5484425A (en) Switching regulator
JPS56121374A (en) Inverter device
JPS57132768A (en) Double voltage rectifier
JPS5574370A (en) Power supply device
JPS5759478A (en) Inverter
JPS5743209A (en) Regulated power supply
JPS5773A (en) Converter circuit in inverter
JPS57184361A (en) Subscriber circuit
JPS5510838A (en) Rectifier
JPS5759479A (en) Inverter
JPS5610730A (en) Negative impedance circuit
JPS5510837A (en) Rectifier
JPS57155625A (en) Constant current power supply device
JPS5382488A (en) Current detecting circuit
JPS5317952A (en) Power supply circuit
JPS55104132A (en) Interface circuit
JPS5510835A (en) Rectifier
JPS5619463A (en) Electric load unit
JPS5640924A (en) Direct current constant voltage power source
JPS56129574A (en) Rectifying circuit
JPS554621A (en) Digital input circuit
JPS5713971A (en) Rectifying circuit
JPS5553180A (en) Power converter
JPS55136722A (en) Isolation type digital signal input circuit