Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9401657 | Input voltage sensor responsive to load conditions | Zhao-Jun Wang, Giao Minh Pham | 2016-07-26 |
| 9263958 | Single-stage power supply with power factor correction and constant current output | — | 2016-02-16 |
| 9246392 | Switched mode power converter controller with ramp time modulation | Balu Balakrishnan, Giao Minh Pham, Lance M. Wong | 2016-01-26 |
| 9116538 | Method and apparatus to increase efficiency in a power factor correction circuit | — | 2015-08-25 |
| 8749212 | Method and apparatus to control a power factor correction circuit | — | 2014-06-10 |
| 8537582 | Single-stage power supply with power factor correction and constant current output | — | 2013-09-17 |
| 8525493 | Method and apparatus to increase efficiency in a power factor correction circuit | — | 2013-09-03 |
| 8487601 | Method and apparatus to control a power factor correction circuit | — | 2013-07-16 |
| 8305787 | Single-stage power supply with power factor correction and constant current output | — | 2012-11-06 |
| 8098506 | Single-stage power supply with power factor correction and constant current output | — | 2012-01-17 |
| 8040114 | Method and apparatus to increase efficiency in a power factor correction circuit | — | 2011-10-18 |
| 8004262 | Method and apparatus to control a power factor correction circuit | — | 2011-08-23 |
| 7990127 | Method and apparatus for AC to DC power conversion with reduced harmonic current | — | 2011-08-02 |
| 7453710 | Transformerless safety isolation in a power supply using safety capacitors for galvanic isolation | Stefan Bäurle, David Michael Hugh Matthews | 2008-11-18 |
| 6340876 | Method for detecting battery removal or absent battery condition in a constant current charger | — | 2002-01-22 |
| 6151231 | Circuit and method for reactive energy recirculation control in a series-resonant converter | Ashok Patil, John Wendell Oglesbee | 2000-11-21 |
| 6081438 | Parallel-loaded series resonant converter having a piezo-electric crystal as self-oscillating element | Ashok Patil | 2000-06-27 |
| 5815382 | Tracking circuit for power supply output control | Dipti V. Vashi, Jose' Maria Fernandez | 1998-09-29 |