JPS5452448A - Signal transfer circuit - Google Patents

Signal transfer circuit

Info

Publication number
JPS5452448A
JPS5452448A JP11886677A JP11886677A JPS5452448A JP S5452448 A JPS5452448 A JP S5452448A JP 11886677 A JP11886677 A JP 11886677A JP 11886677 A JP11886677 A JP 11886677A JP S5452448 A JPS5452448 A JP S5452448A
Authority
JP
Japan
Prior art keywords
diode led
circuit
widening
noise
resistance
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
JP11886677A
Other languages
Japanese (ja)
Inventor
Makoto Chikuma
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 JP11886677A priority Critical patent/JPS5452448A/en
Publication of JPS5452448A publication Critical patent/JPS5452448A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/38—One-way transmission networks, i.e. unilines

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To reduce the malfuction of a circuit, which transfers signals while maintaining electrical insulation, due to a noise by widening a blind sector against a noise, by providing either shunt or voltage divider circuit to the luminous element of a photocoupler. CONSTITUTION:In the circuit which transfers ON-OFF signals of a contact, etc., resistance RD is connected in parallel to diode LED so as to shunt current IR flowing to diode LED to resistance RD by using the photocoupler equipped with light-emission diode LED and photo transistor PT. Then, it is made possible to discriminate that the contact turns ON when the current flows to diode LED a half as much as ID, thereby widening the range in which the mixing of a noise can be discriminated. It is also recommended to connecting Zener diode ZD in series to the circuit obtained by connecting diode LED and resistance RD in parallel, and the voltage is divided at the same time so as to widen the range of a blind sector, thereby widening the margin against noises.
JP11886677A 1977-10-03 1977-10-03 Signal transfer circuit Pending JPS5452448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11886677A JPS5452448A (en) 1977-10-03 1977-10-03 Signal transfer circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11886677A JPS5452448A (en) 1977-10-03 1977-10-03 Signal transfer circuit

Publications (1)

Publication Number Publication Date
JPS5452448A true JPS5452448A (en) 1979-04-25

Family

ID=14747054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11886677A Pending JPS5452448A (en) 1977-10-03 1977-10-03 Signal transfer circuit

Country Status (1)

Country Link
JP (1) JPS5452448A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102575A (en) * 1981-12-14 1983-06-18 Sanyo Electric Co Ltd Insulating type variable resistor device
JPH10177697A (en) * 1996-12-17 1998-06-30 Yazaki Corp Interface and automatic alarm device using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102575A (en) * 1981-12-14 1983-06-18 Sanyo Electric Co Ltd Insulating type variable resistor device
JPS6352804B2 (en) * 1981-12-14 1988-10-20 Sanyo Electric Co
JPH10177697A (en) * 1996-12-17 1998-06-30 Yazaki Corp Interface and automatic alarm device using the same

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