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| Number | Title | Issue Date |
| 7005829 | System for precharging a DC link in a variable speed drive A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The... | 02/28/2006 |
| 6717830 | MOS circuit for lowering forward voltage of diodes A circuit for lowering the effective voltage drop of a semi-conductor diode. The circuit includes a first Metal Oxide Semi-conductor (MOS) device connected in parallel with the diode. A bias voltage which is close to but lower than the threshold voltage is applied t... | 04/06/2004 |
| 6046916 | High and low d.c. voltage power supply A device for providing a high d.c. voltage supply and a low d.c. voltage supply. The device includes, in parallel, a first diode connected in series with a capacitor, a rectifier having a polarity opposite to that of the first diode, and a breakover volta... | 04/04/2000 |
| 4684851 | DC/AC converter for feeding a metal vapor discharge tube A DC/AC converter (30 to 72) for feeding a low-pressure mercury vapor discharge tube (15) comprises two series-connected main transistors (11 and 20) which, in the operating condition, are alternately conducting. The conduction times of the two transistor... | 08/04/1987 |
| 4188585 | Synchronized receiver power system A portable radio receiver powered by a battery includes an RF amplifier, an IF amplifier and an audio amplifier powered by a first regulated, switched, DC power converter that derives a first DC voltage. A frequency synthesizer, including varactor diodes,... | 02/12/1980 |
