GB834099A - Improvements in transistor inverters for use with fluorescent tubes - Google Patents
Improvements in transistor inverters for use with fluorescent tubesInfo
- Publication number
- GB834099A GB834099A GB32933/57A GB3293357A GB834099A GB 834099 A GB834099 A GB 834099A GB 32933/57 A GB32933/57 A GB 32933/57A GB 3293357 A GB3293357 A GB 3293357A GB 834099 A GB834099 A GB 834099A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- transformer
- primary winding
- winding
- additional
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
834,099. Supply systems for discharge lamps. WIDAKOWICH, M. Oct. 22, 1957 [Oct. 22, 1956], No. 32933/57. Class 38 (4). [Also in Group XL (c)] A transistor inverter circuit for supplying fluorescent tubes whereby the output current remains substantially constant and independent of fluctuations in the D.C. supply voltage comprises a stray field transformer having a primary winding 4 energized from a battery 2, through a transistor 3 controlled by a feedback winding 5 connected between the base and emitter giving an output frequency proportional to the D.C. input voltage. The secondary winding 6 is coupled to a tube 7. A push-pull arrangement giving a symmetrical output is described which may have an additional transformer primary winding connected in the output transformer common primary connection developing additional potential on the rapid change of the currents at positive and negative peaks, which is added either to the primary or secondary output voltages of the output transformer. The additional transformer primary winding may alternatively be connected in series with a capacitor across the output transformer primary winding. The sawtooth voltage output may be changed to a square-wave type by the addition of a second stage feeding the output transformer, the second stage being switched by a circuit similar to that described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE834099X | 1956-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB834099A true GB834099A (en) | 1960-05-04 |
Family
ID=20354018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32933/57A Expired GB834099A (en) | 1956-10-22 | 1957-10-22 | Improvements in transistor inverters for use with fluorescent tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB834099A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3434007A (en) * | 1966-10-24 | 1969-03-18 | Automatic Displays Inc | Electrical control means for a changeable exhibitor |
-
1957
- 1957-10-22 GB GB32933/57A patent/GB834099A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3434007A (en) * | 1966-10-24 | 1969-03-18 | Automatic Displays Inc | Electrical control means for a changeable exhibitor |
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