GB2017297A - Optically Sensitive Switch - Google Patents

Optically Sensitive Switch

Info

Publication number
GB2017297A
GB2017297A GB7908885A GB7908885A GB2017297A GB 2017297 A GB2017297 A GB 2017297A GB 7908885 A GB7908885 A GB 7908885A GB 7908885 A GB7908885 A GB 7908885A GB 2017297 A GB2017297 A GB 2017297A
Authority
GB
United Kingdom
Prior art keywords
fet
photovoltaic means
optically sensitive
switch
sensitive switch
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
GB7908885A
Other versions
GB2017297B (en
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB2017297A publication Critical patent/GB2017297A/en
Application granted granted Critical
Publication of GB2017297B publication Critical patent/GB2017297B/en
Expired 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
    • H03K17/51—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
    • H03K17/785—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 field-effect transistor switches

Abstract

An optically sensitive switch, e.g. for use in an opto-isolator, comprises a FET (3) exemplified by an n-channel depletion mode device, gate voltage being provided by photovoltaic means (7) exemplified by an array of photodiodes connected in series. The switch may be turned on or (as in the example) off by illuminating the photovoltaic means, no other power source being required. By including a similar photovoltaic means between drain and gate, with reverse polarity blocking diodes in series with each of the photovoltaic means, a bilateral switch may be provided. A further level of control may be obtained by using a photo-FET as the FET. <IMAGE>
GB7908885A 1978-03-23 1979-03-13 Optically sensitive switch Expired GB2017297B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88926178A 1978-03-23 1978-03-23

Publications (2)

Publication Number Publication Date
GB2017297A true GB2017297A (en) 1979-10-03
GB2017297B GB2017297B (en) 1982-10-27

Family

ID=25394814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7908885A Expired GB2017297B (en) 1978-03-23 1979-03-13 Optically sensitive switch

Country Status (11)

Country Link
JP (1) JPS5530292A (en)
BE (1) BE874946A (en)
CA (1) CA1123064A (en)
CH (1) CH644472A5 (en)
DE (1) DE2910748A1 (en)
ES (1) ES478910A1 (en)
FR (1) FR2420883A1 (en)
GB (1) GB2017297B (en)
IT (1) IT1112401B (en)
NL (1) NL7902277A (en)
SE (1) SE7902344L (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048146A1 (en) * 1980-09-12 1982-03-24 Theta-J-Corporation Solid state optically coupled electrical switch
EP0057446A1 (en) * 1981-01-30 1982-08-11 Tokyo Kogaku Kikai Kabushiki Kaisha Surveying instrument having measuring mode selecting switch means
EP0064025B1 (en) * 1981-04-22 1985-08-14 Asulab S.A. Electronic watch having fixed control means
EP0398246A2 (en) * 1989-05-17 1990-11-22 Kabushiki Kaisha Toshiba Photocoupler apparatus capable of shortening switching time of output contact
FR2725084A1 (en) * 1994-09-26 1996-03-29 Sextant Avionique Autonomous electric supply for electronic labels
USRE35836E (en) * 1979-08-09 1998-07-07 C. P. Clare Corporation Solid state optically coupled electrical power switch

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118364A1 (en) * 1981-05-08 1982-11-25 Siemens AG, 1000 Berlin und 8000 München LIGHT INITIAL THYRISTOR WITH OPTOELECTRONICALLY CONTROLLED EMITTER SHORT CIRCUITS AND METHOD FOR ITS OPERATION
JPS57192129A (en) * 1981-05-21 1982-11-26 Omron Tateisi Electronics Co Semiconductor relay
US4419586A (en) * 1981-08-27 1983-12-06 Motorola, Inc. Solid-state relay and regulator
JPS62289013A (en) * 1986-06-06 1987-12-15 Agency Of Ind Science & Technol Switching device
JPH01158821A (en) * 1987-12-15 1989-06-21 Matsushita Electric Works Ltd Latching type semiconductor relay
EP0392373A3 (en) * 1989-04-14 1992-10-21 Siemens Aktiengesellschaft Circuit device for potentialfree driving of a field effect transistor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770968A (en) * 1972-02-24 1973-11-06 Ibm Field effect transistor detector amplifier cell and circuit for low level light signals
JPS4921049A (en) * 1972-04-17 1974-02-25
DE2511478A1 (en) * 1975-03-15 1976-09-23 Rollei Werke Franke Heidecke CIRCUIT ARRANGEMENT FOR AMPLIFICATION OF PHOTO FLOW

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35836E (en) * 1979-08-09 1998-07-07 C. P. Clare Corporation Solid state optically coupled electrical power switch
EP0048146A1 (en) * 1980-09-12 1982-03-24 Theta-J-Corporation Solid state optically coupled electrical switch
EP0057446A1 (en) * 1981-01-30 1982-08-11 Tokyo Kogaku Kikai Kabushiki Kaisha Surveying instrument having measuring mode selecting switch means
EP0064025B1 (en) * 1981-04-22 1985-08-14 Asulab S.A. Electronic watch having fixed control means
EP0398246A2 (en) * 1989-05-17 1990-11-22 Kabushiki Kaisha Toshiba Photocoupler apparatus capable of shortening switching time of output contact
EP0398246A3 (en) * 1989-05-17 1993-07-21 Kabushiki Kaisha Toshiba Photocoupler apparatus capable of shortening switching time of output contact
FR2725084A1 (en) * 1994-09-26 1996-03-29 Sextant Avionique Autonomous electric supply for electronic labels

Also Published As

Publication number Publication date
IT7921188A0 (en) 1979-03-21
FR2420883B1 (en) 1982-10-22
CA1123064A (en) 1982-05-04
DE2910748A1 (en) 1979-09-27
FR2420883A1 (en) 1979-10-19
SE7902344L (en) 1979-09-24
ES478910A1 (en) 1979-07-01
BE874946A (en) 1979-07-16
NL7902277A (en) 1979-09-25
CH644472A5 (en) 1984-07-31
JPS5530292A (en) 1980-03-04
IT1112401B (en) 1986-01-13
GB2017297B (en) 1982-10-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee