GB2012139A - Protection circuit - Google Patents
Protection circuitInfo
- Publication number
- GB2012139A GB2012139A GB79442A GB7900442A GB2012139A GB 2012139 A GB2012139 A GB 2012139A GB 79442 A GB79442 A GB 79442A GB 7900442 A GB7900442 A GB 7900442A GB 2012139 A GB2012139 A GB 2012139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- collector
- connection
- protection circuit
- current
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
- Protection Of Static Devices (AREA)
- Bipolar Transistors (AREA)
- Electronic Switches (AREA)
- Amplifiers (AREA)
- Bipolar Integrated Circuits (AREA)
Abstract
A circuit arrangement including an over-current protected transistor. The transistor (1 or 20, 21, 22) is provided with a threshold circuit (3) arranged to sense when a critical value is exceeded by a collector current taken from a collector region of the transistor via a collector connection (2 or 28) and in dependence thereof cut off a base current to the transistor, the threshold circuit having an input (4) provided with a connection (5 or 25) to the collector region (22) of the transistor separate from the first-mentioned collector connection (2 or 28). <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7800277A SE409789B (en) | 1978-01-10 | 1978-01-10 | OVERCURRENT PROTECTED TRANSISTOR |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2012139A true GB2012139A (en) | 1979-07-18 |
GB2012139B GB2012139B (en) | 1982-03-10 |
Family
ID=20333633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB79442A Expired GB2012139B (en) | 1978-01-10 | 1979-01-05 | Circuit arrangement including an over-current protected transistor |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU524509B2 (en) |
DE (1) | DE2900236A1 (en) |
FR (1) | FR2414251B1 (en) |
GB (1) | GB2012139B (en) |
IT (1) | IT1110441B (en) |
SE (1) | SE409789B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0263343A2 (en) * | 1986-09-30 | 1988-04-13 | STMicroelectronics S.r.l. | Power transistor with self-protection against direct secondary breakdown |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL239104A (en) * | 1958-05-26 | 1900-01-01 | Western Electric Co | |
US3845405A (en) * | 1973-05-24 | 1974-10-29 | Rca Corp | Composite transistor device with over current protection |
FR2320635A1 (en) * | 1975-08-05 | 1977-03-04 | Thomson Csf | PROTECTION DEVICE FOR TRANSISTOR, ESPECIALLY FOR MONOLITHIC INTEGRATED CIRCUIT TRANSISTOR, AND TRANSISTOR PROVIDED WITH SUCH A DEVICE |
SE396853B (en) * | 1976-11-12 | 1977-10-03 | Ericsson Telefon Ab L M | TVAPOL INCLUDING A TRANSISTOR |
US4180749A (en) * | 1977-07-18 | 1979-12-25 | Texas Instruments Incorporated | Input buffer for integrated injection logic circuits |
-
1978
- 1978-01-10 SE SE7800277A patent/SE409789B/en not_active IP Right Cessation
-
1979
- 1979-01-04 AU AU43123/79A patent/AU524509B2/en not_active Ceased
- 1979-01-04 DE DE19792900236 patent/DE2900236A1/en active Granted
- 1979-01-05 GB GB79442A patent/GB2012139B/en not_active Expired
- 1979-01-09 FR FR7900446A patent/FR2414251B1/en not_active Expired
- 1979-01-10 IT IT7919179A patent/IT1110441B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0263343A2 (en) * | 1986-09-30 | 1988-04-13 | STMicroelectronics S.r.l. | Power transistor with self-protection against direct secondary breakdown |
EP0263343A3 (en) * | 1986-09-30 | 1989-10-11 | Sgs Microelettronica S.P.A. | Power transistor with self-protection against direct secondary breakdown |
Also Published As
Publication number | Publication date |
---|---|
IT1110441B (en) | 1985-12-23 |
DE2900236C2 (en) | 1990-06-21 |
SE409789B (en) | 1979-09-03 |
FR2414251B1 (en) | 1985-09-27 |
AU524509B2 (en) | 1982-09-23 |
GB2012139B (en) | 1982-03-10 |
FR2414251A1 (en) | 1979-08-03 |
SE7800277L (en) | 1979-07-11 |
IT7919179A0 (en) | 1979-01-10 |
AU4312379A (en) | 1979-07-19 |
DE2900236A1 (en) | 1979-07-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |