JPS57197920A - Signal transferring circuit - Google Patents

Signal transferring circuit

Info

Publication number
JPS57197920A
JPS57197920A JP56083585A JP8358581A JPS57197920A JP S57197920 A JPS57197920 A JP S57197920A JP 56083585 A JP56083585 A JP 56083585A JP 8358581 A JP8358581 A JP 8358581A JP S57197920 A JPS57197920 A JP S57197920A
Authority
JP
Japan
Prior art keywords
voltage
switch
reduced
resistance
turns
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
JP56083585A
Other languages
Japanese (ja)
Inventor
Takayuki Torii
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP56083585A priority Critical patent/JPS57197920A/en
Publication of JPS57197920A publication Critical patent/JPS57197920A/en
Pending 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
    • H03K17/04—Modifications for accelerating switching

Abstract

PURPOSE:To prevent a switch speed from being reduced even when the voltage at a reception side is high, by providing a voltage reducing circuit in parallel to a switch controlled by a sent signal, and applying the voltage reduction output to a switch control part. CONSTITUTION:When a voltage signal generation part 1 generates a pulse signal, a transistor (TR)2 turns on and an LED3 turns on. Therefore, a phototransistor 11 turns on to develop a voltage across a resistance 12. This voltage is divided through resistances 13 and 14 to turn on a switch 9 composed of Darlington- connected TRs, thus equalizing the impedance between signal lines 6 to that of a resistance 8. The voltage between the signal lines 6, even if high, is reduced by a resistance 17 and a Zener diode 19 and then applied to the TR11, so resistance values of the resistances 12-14 are reduced, so that the switch speed of a switch 3 is not reduced.
JP56083585A 1981-05-29 1981-05-29 Signal transferring circuit Pending JPS57197920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56083585A JPS57197920A (en) 1981-05-29 1981-05-29 Signal transferring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56083585A JPS57197920A (en) 1981-05-29 1981-05-29 Signal transferring circuit

Publications (1)

Publication Number Publication Date
JPS57197920A true JPS57197920A (en) 1982-12-04

Family

ID=13806567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56083585A Pending JPS57197920A (en) 1981-05-29 1981-05-29 Signal transferring circuit

Country Status (1)

Country Link
JP (1) JPS57197920A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63257328A (en) * 1987-04-15 1988-10-25 Nec Corp Switch circuit for electronic letter coil
JP2016072676A (en) * 2014-09-26 2016-05-09 パナソニックＩｐマネジメント株式会社 Semiconductor relay

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55680A (en) * 1979-03-12 1980-01-07 Omron Tateisi Electronics Co Detection switch
JPS5661721A (en) * 1979-10-22 1981-05-27 Omron Tateisi Electronics Co Ac type photoelectric switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55680A (en) * 1979-03-12 1980-01-07 Omron Tateisi Electronics Co Detection switch
JPS5661721A (en) * 1979-10-22 1981-05-27 Omron Tateisi Electronics Co Ac type photoelectric switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63257328A (en) * 1987-04-15 1988-10-25 Nec Corp Switch circuit for electronic letter coil
JP2016072676A (en) * 2014-09-26 2016-05-09 パナソニックＩｐマネジメント株式会社 Semiconductor relay

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