Power supply
US4757433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Jan 7, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power converter, particularly adapted for supplying high voltage power for a CRT, for converting an unregulated level of input power to a regulated level of output power is described. The power converter includes a self-excited sinusoidal power oscillator comprising a transformer which has a secondary winding that resonates at a resonating frequency in response to the input signal and a field effect transistor connected to operate as a Class C amplifier. The field effect transistor is connected so that both the drain and gate voltages can both be provided by the primary windings of the tranformer and oscillate at the resonant frequencies so that the positive peak gate voltage can be used to control the output of the power oscillator, which in turn controls the power output of the converter. The gate of the FET is connected to a control bus which in turn can be connected to controls for controlling the control signal in accordance with any one of a plurality of control conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.