GB1383440A - Electric coupling arrangements - Google Patents

Electric coupling arrangements

Info

Publication number
GB1383440A
GB1383440A GB424372A GB424372A GB1383440A GB 1383440 A GB1383440 A GB 1383440A GB 424372 A GB424372 A GB 424372A GB 424372 A GB424372 A GB 424372A GB 1383440 A GB1383440 A GB 1383440A
Authority
GB
United Kingdom
Prior art keywords
pairs
transistors
switching
signal
phototransistors
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.)
Expired
Application number
GB424372A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1383440A publication Critical patent/GB1383440A/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
    • H03K17/795—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
    • 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
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor
    • H03K17/663—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor using complementary bipolar transistors

Abstract

1383440 Switching circuits TELEFONAKTIEBOLAGET L M ERICSSON 28 Jan 1972 [29 Jan 1971] 4243/72 Heading H3T A switching circuit comprises four switching devices, shown as transistors T1-T4, arranged in respective arms of a bridge and two control switches, shown as transistors T 5 and T 6 , connected between the control electrodes of respective diagonally opposite pairs of devices whereby a signal at an input terminal IN turns on one or other of the pairs of switching devices' As described, the transistors T 5 and T 6 are phototransistors controlled by luminescent diodes arranged in anti-parallel in series with a respective Zener diode so that an input signal exceeding a given value switches on one or other of the transistor pairs according to its polarity. A delay circuit RC at the input prevents both pairs being switched on together by the signal and further protection against simultaneous conduction is effected by phototransistors F t1 -F t4 which are controlled by luminescent diodes L 1 -L 4 to short the baseemitter path of one transistor when the adjacent one is conducting.
GB424372A 1971-01-29 1972-01-28 Electric coupling arrangements Expired GB1383440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE01056/71A SE349694B (en) 1971-01-29 1971-01-29

Publications (1)

Publication Number Publication Date
GB1383440A true GB1383440A (en) 1974-02-12

Family

ID=20257530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB424372A Expired GB1383440A (en) 1971-01-29 1972-01-28 Electric coupling arrangements

Country Status (13)

Country Link
US (1) US3778641A (en)
JP (1) JPS5519090B1 (en)
BE (1) BE778628A (en)
DE (1) DE2202282C3 (en)
DK (1) DK129489B (en)
ES (1) ES399203A1 (en)
FR (1) FR2123532B1 (en)
GB (1) GB1383440A (en)
IT (1) IT962052B (en)
NL (1) NL7200694A (en)
NO (1) NO130332B (en)
SE (1) SE349694B (en)
SU (1) SU495853A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869641A (en) * 1972-06-21 1975-03-04 Monsanto Co AC Responsive led pilot light circuitry
BE897772A (en) * 1983-09-19 1984-03-19 Itt Ind Belgium ELECTRONIC CONTACTS AND RELATED DEVICES
IT1251205B (en) * 1991-09-18 1995-05-04 St Microelectronics Srl H-BRIDGE CIRCUIT WITH PROTECTION AGAINST CROSS-CONDUCTING DURING THE REVERSAL OF THE CURRENT IN THE LOAD.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010031A (en) * 1956-10-24 1961-11-21 Research Corp Symmetrical back-clamped transistor switching sircuit
US3042810A (en) * 1958-01-21 1962-07-03 Robert W Rochelle Five transistor bistable counter circuit
DE1264513C2 (en) * 1963-11-29 1973-01-25 Texas Instruments Inc REFERENCE POTENTIAL FREE DC DIFFERENCE AMPLIFIER
US3417249A (en) * 1963-12-30 1968-12-17 Ibm Four terminal electro-optical logic device
US3278923A (en) * 1964-06-30 1966-10-11 Specialties Dev Corp System for detecting intruders
US3524986A (en) * 1967-02-06 1970-08-18 Gen Electric Semiconductor light gating of light activated semiconductor power control circuits
US3492488A (en) * 1967-09-11 1970-01-27 Bell Telephone Labor Inc Photon coupling for a communication circuit
FR2039564A5 (en) * 1969-04-09 1971-01-15 Bull General Electric

Also Published As

Publication number Publication date
DK129489C (en) 1975-03-03
DE2202282B2 (en) 1973-11-08
DE2202282C3 (en) 1974-06-06
NO130332B (en) 1974-08-12
SU495853A3 (en) 1975-12-15
JPS5519090B1 (en) 1980-05-23
IT962052B (en) 1973-12-20
BE778628A (en) 1972-05-16
FR2123532B1 (en) 1977-04-01
FR2123532A1 (en) 1972-09-08
NL7200694A (en) 1972-08-01
US3778641A (en) 1973-12-11
ES399203A1 (en) 1975-06-16
SE349694B (en) 1972-10-02
DE2202282A1 (en) 1972-08-10
DK129489B (en) 1974-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee