GB1383440A - Electric coupling arrangements - Google Patents
Electric coupling arrangementsInfo
- 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
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
Landscapes
- Electronic Switches (AREA)
- Led Devices (AREA)
- Control Of Electrical Variables (AREA)
- Amplifiers (AREA)
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.
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)
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)
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 |
-
1971
- 1971-01-29 SE SE01056/71A patent/SE349694B/xx unknown
-
1972
- 1972-01-18 NL NL7200694A patent/NL7200694A/xx not_active Application Discontinuation
- 1972-01-18 DE DE2202282A patent/DE2202282C3/en not_active Expired
- 1972-01-20 US US00219389A patent/US3778641A/en not_active Expired - Lifetime
- 1972-01-21 SU SU1741250A patent/SU495853A3/en active
- 1972-01-26 ES ES399203A patent/ES399203A1/en not_active Expired
- 1972-01-28 GB GB424372A patent/GB1383440A/en not_active Expired
- 1972-01-28 IT IT19956/72A patent/IT962052B/en active
- 1972-01-28 DK DK40072AA patent/DK129489B/en unknown
- 1972-01-28 FR FR7202974A patent/FR2123532B1/fr not_active Expired
- 1972-01-28 NO NO00224/72A patent/NO130332B/no unknown
- 1972-01-28 BE BE778628A patent/BE778628A/en unknown
- 1972-01-29 JP JP1025872A patent/JPS5519090B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
SU495853A3 (en) | 1975-12-15 |
DK129489B (en) | 1974-10-14 |
JPS5519090B1 (en) | 1980-05-23 |
DE2202282B2 (en) | 1973-11-08 |
DE2202282A1 (en) | 1972-08-10 |
ES399203A1 (en) | 1975-06-16 |
BE778628A (en) | 1972-05-16 |
IT962052B (en) | 1973-12-20 |
US3778641A (en) | 1973-12-11 |
NO130332B (en) | 1974-08-12 |
DE2202282C3 (en) | 1974-06-06 |
SE349694B (en) | 1972-10-02 |
DK129489C (en) | 1975-03-03 |
NL7200694A (en) | 1972-08-01 |
FR2123532A1 (en) | 1972-09-08 |
FR2123532B1 (en) | 1977-04-01 |
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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 |