FR2399148A1 - Circuit de protection de transistors contre des surcharges - Google Patents
Circuit de protection de transistors contre des surchargesInfo
- Publication number
- FR2399148A1 FR2399148A1 FR7822033A FR7822033A FR2399148A1 FR 2399148 A1 FR2399148 A1 FR 2399148A1 FR 7822033 A FR7822033 A FR 7822033A FR 7822033 A FR7822033 A FR 7822033A FR 2399148 A1 FR2399148 A1 FR 2399148A1
- Authority
- FR
- France
- Prior art keywords
- transistor
- circuit
- protection circuit
- against overloads
- circuit against
- 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
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Amplifiers (AREA)
- Protection Of Static Devices (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Circuit de protection de transistors contre les surcharges. Circuit comprenant une résistance à coefficient de temperature positif, ou << conducteur froid >> RPTC , reliée par une liaison bonne conductrice de la chaleur au transistor à protéger Q21 et connectée électriquement à lui, et un limiteur de tension D1 relié à la base du transistor Q21. Il est prévu, dans le circuit de commande du transistor à protéger Q21, Q22, un transistor de commande Q1, le conducteur froid RPTC est branché dans le circuit du transistor de commande Q1, et le limiteur de tension D1 est relié à l'entrée du transistor de commande Q1. Application à la protection de transistors soumis à de forts courants de charge et une faible tension de sortie.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772733749 DE2733749B2 (de) | 1977-07-27 | 1977-07-27 | Überlastungsschutz für Transistoren |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2399148A1 true FR2399148A1 (fr) | 1979-02-23 |
FR2399148B1 FR2399148B1 (fr) | 1984-06-29 |
Family
ID=6014889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7822033A Granted FR2399148A1 (fr) | 1977-07-27 | 1978-07-25 | Circuit de protection de transistors contre des surcharges |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2733749B2 (fr) |
FR (1) | FR2399148A1 (fr) |
GB (1) | GB1596100A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757441A1 (fr) * | 1995-07-31 | 1997-02-05 | STMicroelectronics S.r.l. | Circuit intégré pour limiter une tension |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4360852A (en) * | 1981-04-01 | 1982-11-23 | Allis-Chalmers Corporation | Overcurrent and overtemperature protective circuit for power transistor system |
GB9016668D0 (en) * | 1990-07-30 | 1990-09-12 | Nad Electronics Ltd | Power amplifier protection circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1377509A (fr) * | 1963-09-25 | 1964-11-06 | Amplificateurs à transistors de performances et de sécurité de fonctionnement élevées | |
US3332027A (en) * | 1962-08-28 | 1967-07-18 | Tdk Electronics Co Ltd | Output transistor protecting system in a transistor amplifier circuit |
FR2249463A1 (fr) * | 1973-10-29 | 1975-05-23 | Honeywell Gmbh |
-
1977
- 1977-07-27 DE DE19772733749 patent/DE2733749B2/de not_active Ceased
-
1978
- 1978-05-31 GB GB2519178A patent/GB1596100A/en not_active Expired
- 1978-07-25 FR FR7822033A patent/FR2399148A1/fr active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3332027A (en) * | 1962-08-28 | 1967-07-18 | Tdk Electronics Co Ltd | Output transistor protecting system in a transistor amplifier circuit |
FR1377509A (fr) * | 1963-09-25 | 1964-11-06 | Amplificateurs à transistors de performances et de sécurité de fonctionnement élevées | |
FR2249463A1 (fr) * | 1973-10-29 | 1975-05-23 | Honeywell Gmbh |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757441A1 (fr) * | 1995-07-31 | 1997-02-05 | STMicroelectronics S.r.l. | Circuit intégré pour limiter une tension |
US5818120A (en) * | 1995-07-31 | 1998-10-06 | Sgs-Thomson Microelectronis, S.R.L. | Circuit for limiting an overvoltage on a control switch connected in series with an inductive load |
Also Published As
Publication number | Publication date |
---|---|
DE2733749A1 (de) | 1979-02-15 |
FR2399148B1 (fr) | 1984-06-29 |
DE2733749B2 (de) | 1981-01-29 |
GB1596100A (en) | 1981-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |