GB958573A - Improvements in or relating to switching transistor arrangements for electrical supply circuits - Google Patents
Improvements in or relating to switching transistor arrangements for electrical supply circuitsInfo
- Publication number
- GB958573A GB958573A GB3462659A GB3462659A GB958573A GB 958573 A GB958573 A GB 958573A GB 3462659 A GB3462659 A GB 3462659A GB 3462659 A GB3462659 A GB 3462659A GB 958573 A GB958573 A GB 958573A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- potential
- relating
- switching
- switching transistor
- 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
- H03K17/08—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
- Electronic Switches (AREA)
Abstract
958,573. Transistor switching circuits. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. Oct. 13, 1960 [Oct. 13, 1959], No. 34626/59. Heading H3T. A switching circuit comprises a first transistor 4 with a driver 5 for switching it on and off and a second transistor 6 of opposite conductivity type the arrangement being such that when the first transistor 4 is on, the base electrodes and one of the other two electrodes of both transistors are at the same potential. Voltage sensitive means 8 are provided to be responsive to the potential at the one electrode of transistor 6 to cause the driver 5 to switch off transistor 4 when the potential at the one electrode exceeds a predetermined value. When transistor 4 is conducting, transistor 6 is out off, and current is supplied to load 1. An excess voltage across the emitter-collector path of transistor 4 is sensed by the means 8 which produces an output to switch transistor 4 off and transistor 6 on, thus reducing the input to the sensing means 8. Means may also be provided to operate a relay to disconnect the circuit from the supply if the potential at the emitter of transistor 6 falls below a specific value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3462659A GB958573A (en) | 1959-10-13 | 1959-10-13 | Improvements in or relating to switching transistor arrangements for electrical supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3462659A GB958573A (en) | 1959-10-13 | 1959-10-13 | Improvements in or relating to switching transistor arrangements for electrical supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB958573A true GB958573A (en) | 1964-05-21 |
Family
ID=10367993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3462659A Expired GB958573A (en) | 1959-10-13 | 1959-10-13 | Improvements in or relating to switching transistor arrangements for electrical supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB958573A (en) |
-
1959
- 1959-10-13 GB GB3462659A patent/GB958573A/en not_active Expired
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