GB1048035A - Improvements in or relating to power supply circuits - Google Patents
Improvements in or relating to power supply circuitsInfo
- Publication number
- GB1048035A GB1048035A GB2296363A GB2296363A GB1048035A GB 1048035 A GB1048035 A GB 1048035A GB 2296363 A GB2296363 A GB 2296363A GB 2296363 A GB2296363 A GB 2296363A GB 1048035 A GB1048035 A GB 1048035A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- resistor
- collector
- base
- voltage
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Amplifiers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
1,048,035. Automatic voltage control. H. WELLHAUSEN.June 10, 1963 [June 9, 1962], No. 22963/63. Heading G3R. [Also in Division H3] In a voltage regulator of the series transistor type, the main transistor is protected against excessive power dissipation by a circuit which is connected across the collector and base of the transistor and which comprises the series combination of a resistor carrying the load current, a second resistor, and a voltage-dependent element. As shown, a voltage regulator supplying a load 2 includes a main transistor 1 and a resistor 9 connected between the collector of the transistor and the load. The end of resistor 9 remote from the collector is connected over a resistor 11 and a Zener diode 10 to the base of transistor 1. When a certain current is exceeded, the voltage drop across resistor 9 and the voltage drop across the collector/emitter circuit of transistor 1 are together sufficient to render Zener diode 10 conductive so that a base current flows in the transistor; on a further increase in current, e.g. on overload or short circuit, this base current causes the collector/emitter voltage to fall, so that most of the input voltage is dropped across the resistor 9 which is so dimensioned that the maximum transistor current is not exceeded even on short circuit. The transistor 1 is thus protected against damage; a fuse can be connected in circuit to protect the supply source. The regulator may include a further Zener diode connected across the collector/base circuit of transistor 1 and an amplifying transistor connected to the base of the transistor (Figs.4 and 6, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW32401A DE1158627B (en) | 1962-06-09 | 1962-06-09 | Protection circuit for a regulated transistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1048035A true GB1048035A (en) | 1966-11-09 |
Family
ID=7600026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2296363A Expired GB1048035A (en) | 1962-06-09 | 1963-06-10 | Improvements in or relating to power supply circuits |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1158627B (en) |
| GB (1) | GB1048035A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1275682B (en) * | 1963-12-21 | 1968-08-22 | Fernseh Gmbh | Circuit arrangement for overload protection of a power transistor |
| DE1538517B1 (en) * | 1966-04-28 | 1973-06-07 | Triumph Werke Nuernberg Ag | ELECTRONIC FUSE |
| DE3131429C2 (en) * | 1981-08-07 | 1986-03-20 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Transistor power circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1925548A (en) * | 1933-09-05 | Manufacture of emulsions of oxi- | ||
| DE1072714B (en) * | 1958-02-13 | 1960-01-07 | Westinghouse Electric Corporation, East Pittsburgh, Pa. (V. St. A.) | Power supply protection circuit |
| DE1084820B (en) * | 1959-07-14 | 1960-07-07 | Licentia Gmbh | Short-circuit protection circuit for transistor power supplies |
-
1962
- 1962-06-09 DE DEW32401A patent/DE1158627B/en active Pending
-
1963
- 1963-06-10 GB GB2296363A patent/GB1048035A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1158627B (en) | 1963-12-05 |
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