GB1197912A - Improvements in or relating to Regulated d.c. Power Supplies - Google Patents
Improvements in or relating to Regulated d.c. Power SuppliesInfo
- Publication number
- GB1197912A GB1197912A GB3282667A GB3282667A GB1197912A GB 1197912 A GB1197912 A GB 1197912A GB 3282667 A GB3282667 A GB 3282667A GB 3282667 A GB3282667 A GB 3282667A GB 1197912 A GB1197912 A GB 1197912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- diode
- output
- breakdown
- 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
-
- 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)
- Amplifiers (AREA)
Abstract
1,197,912. Automatic voltage control. HAWKER SIDDELEY DYNAMICS Ltd. July 17, 1967, No.32826/67. Heading G3R. A direct voltage stabilizer comprises a series transistor 1 connected with its collector on the output side and having a base drive from an amplifier 2 responsive to output voltage variations, as detected by a circuit including a voltage divider 3 and a reference Zener diode 4, there being connected in a parallel channel across the collector emitter path of the transistor 1 a voltage breakdown device 6, e.g. a Zener diode. The diode 6 will conduct only when the difference between input and output voltages exceeds its breakdown voltage; this condition obtains when the circuit is first switched on, thus enabling the amplifier 2 initially to apply bias to transistor 1, whereby the output voltage is established; there-after the said difference will be less than the breakdown voltage of the diode 6 which will then be non- conductive. A current limiting resistor 7 may be provided, and as shown in Fig.4, the diode 6 may be connected to the junction between a resistor 9 and a Zener diode 8 connected across the input terminals, the arrangement then being such as to ensure that the voltage applied to the diode 6 during normal operation is less than the sum of the output voltage and the breakdown voltage of the diode 6 so that the diode 6 will not conduct even if the input voltage should rise to a level greater than the said sum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3282667A GB1197912A (en) | 1967-07-17 | 1967-07-17 | Improvements in or relating to Regulated d.c. Power Supplies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3282667A GB1197912A (en) | 1967-07-17 | 1967-07-17 | Improvements in or relating to Regulated d.c. Power Supplies |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1197912A true GB1197912A (en) | 1970-07-08 |
Family
ID=10344574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3282667A Expired GB1197912A (en) | 1967-07-17 | 1967-07-17 | Improvements in or relating to Regulated d.c. Power Supplies |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1197912A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498835A1 (en) * | 1981-01-28 | 1982-07-30 | Philips Nv | CIRCUIT FOR DELAYED INPUT OF POWER SUPPLY VOLTAGE |
GB2308467B (en) * | 1995-12-19 | 1999-12-29 | Contec Ltd | Low cost power supply regulator |
-
1967
- 1967-07-17 GB GB3282667A patent/GB1197912A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498835A1 (en) * | 1981-01-28 | 1982-07-30 | Philips Nv | CIRCUIT FOR DELAYED INPUT OF POWER SUPPLY VOLTAGE |
GB2308467B (en) * | 1995-12-19 | 1999-12-29 | Contec Ltd | Low cost power supply regulator |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |