Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7570037 | Hybrid control methods for digital pulse width modulator (DPWM) | Jian-Feng Li, Dong Sam Ha, Yang Qiu, Fred C. Lee | 2009-08-04 |
| 7560912 | Hybrid filter for high slew rate output current application | Yuancheng Ren, Fred C. Lee, Andrew P. Schmit | 2009-07-14 |
| 7541793 | Parallel power supply with active droop current sharing circuit having current limiting function | Sakda Saeueng | 2009-06-02 |
| 7265525 | Self-driven scheme for synchronous rectifier having no body diode | Julu Sun, Jinghai Zhou, Fred C. Lee | 2007-09-04 |
| 7254047 | Power converters having output capacitor resonant with autotransformer leakage inductance | Yuancheng Ren, Julu Sun, Fred C. Lee | 2007-08-07 |
| 7233132 | Current sensing in multiple coupled inductors by time constant matching to leakage inductance | Yan Dong, Fred C. Lee | 2007-06-19 |
| 7199695 | Multiphase voltage regulator having coupled inductors with reduced winding resistance | Jinghai Zhou, Fred C. Lee, Yan Dong | 2007-04-03 |
| 7196914 | Power converters having capacitor resonant with transformer leakage inductance | Yuancheng Ren, Fred C. Lee | 2007-03-27 |
| 7161335 | Adaptive bus voltage positioning for two-stage voltage regulators | Jia Wei, Fred C. Lee | 2007-01-09 |
| 7086137 | Rotor assembly method | Gerald E. Tornquist, James D. Lengel, Raymond W. Borden, Kieran Doherty, WuenFar L. Chen +1 more | 2006-08-08 |
| 7071660 | Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases | Jinghai Zhou, Yuancheng Ren, Fred C. Lee, Jia Wei | 2006-07-04 |
| 7016203 | Self-driven circuit for synchronous rectifier DC/DC converter | Fred C. Lee, Yuancheng Ren | 2006-03-21 |
| 7002331 | Modular power supply system including a power status signal generator to perform fast sag detection to input peak voltage | Sakda Sae-Ueng, Suvimol-Opas Waraluk, Kuei-Hsiang Tsai | 2006-02-21 |
| 6989997 | Quasi-resonant DC-DC converters with reduced body diode loss | Fred C. Lee | 2006-01-24 |
| 6979929 | System and method for retaining wedges in a rotor | Gerald E. Tornquist, James D. Lengel, Raymond W. Borden, Kieran Doherty, WuenFar L. Chen +1 more | 2005-12-27 |
| 6944033 | Multi-phase interleaving isolated DC/DC converter | Fred C. Lee, Jinghai Zhou | 2005-09-13 |
| 6903470 | High speed generator with high-power rotating rectifiers cooling system | Kieran Doherty, Shannon Rogers, William Scherzinger, David E. Stout, Simon Waddell | 2005-06-07 |
| 6868348 | Adaptive high frequency energy detection | Donn V. Stoutenburg | 2005-03-15 |
| 6859372 | Bridge-buck converter with self-driven synchronous rectifiers | Fred C. Lee, Jinghai Zhou | 2005-02-22 |
| 6859019 | System and method for coupling rectifiers of an exciter to the rotor of a main generator | Gerald E. Tornquist, Raymond W. Borden, James D. Lengel, Kieran Doherty, Gregor McDowall | 2005-02-22 |
| 6819574 | Self-driven circuit for synchronous rectifier DC/DC converter | Fred C. Lee, Yuancheng Ren | 2004-11-16 |
| 6791230 | System and method for retaining wedges in a rotor | Gerald E. Tornquist, James D. Lengel, Raymond W. Borden, Kieran Doherty, WuenFar L. Chen +1 more | 2004-09-14 |
| 6781853 | Method and apparatus for reduction of energy loss due to body diode conduction in synchronous rectifiers | Fred C. Lee | 2004-08-24 |
| 6753637 | Exciter rotor assembly | Gerald E. Tornquist, James D. Lengel, Raymond W. Borden, Kieran Doherty, WuenFar L. Chen +1 more | 2004-06-22 |
| 6661135 | Multi-pole high speed generator with a modular rectifier circuit | Raymond W. Borden, Jim Lengel, Kieran Doherty, Gregor McDowall, Gerald E. Tornquist | 2003-12-09 |