JPS5765942A - Electric coupling device - Google Patents

Electric coupling device

Info

Publication number
JPS5765942A
JPS5765942A JP14173280A JP14173280A JPS5765942A JP S5765942 A JPS5765942 A JP S5765942A JP 14173280 A JP14173280 A JP 14173280A JP 14173280 A JP14173280 A JP 14173280A JP S5765942 A JPS5765942 A JP S5765942A
Authority
JP
Japan
Prior art keywords
diode
output
pulse signal
width
amplifier
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
JP14173280A
Other languages
Japanese (ja)
Inventor
Hiromi Kusakabe
Hiroyasu Yamaguchi
Shuichi 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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14173280A priority Critical patent/JPS5765942A/en
Publication of JPS5765942A publication Critical patent/JPS5765942A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/26—Circuits with optical sensing means, i.e. using opto-couplers for isolation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To detect a pulse signal surely even if the width of the pulse width transferred through a photocoupler is very narrow, by inserting a diode between the input and the output of an operational amplifier. CONSTITUTION:When a pulse signal Pi is applied to a light emitting diode D11 of a photocoupler 11, this pulse signal Pi is transferred to both ends of a load resistance RL through a transistor Q11. Then, this signal is applied to the input terminal of an inversion amplifier 13 through a capacitor C11. A negative feedback resistance Rf and a diode D12 are provided between the input terminal and the output termianl of the inversion amplifier 13, and a threshold voltage Vth of the amplifier 13 is always set near the peak value of the voltage vetween both ends of the load resistance RL automatically by the function of the diode D12. Consequently, a pulse output is obtained surely in an output terminal 12 even if the width of the input pulse signal Pi is very narrow.
JP14173280A 1980-10-09 1980-10-09 Electric coupling device Pending JPS5765942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14173280A JPS5765942A (en) 1980-10-09 1980-10-09 Electric coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14173280A JPS5765942A (en) 1980-10-09 1980-10-09 Electric coupling device

Publications (1)

Publication Number Publication Date
JPS5765942A true JPS5765942A (en) 1982-04-21

Family

ID=15298915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14173280A Pending JPS5765942A (en) 1980-10-09 1980-10-09 Electric coupling device

Country Status (1)

Country Link
JP (1) JPS5765942A (en)

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