Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12289057 | Circuits and methods for controlling bidirectional CLLC converters | Chen Wei, Dongfeng Zhu, Haitao Xie, Ying Liu | 2025-04-29 |
| 9204505 | Power converter for interfacing a fluorescent lighting ballast to a light emitting diode lamp | Thomas Stamm | 2015-12-01 |
| 8803439 | Primary-side regulation of output current in a line-powered LED driver | Thomas Stamm | 2014-08-12 |
| 8653801 | Wide input voltage range power factor correction circuit | Thomas L. Hopkins | 2014-02-18 |
| 8436593 | Wide input voltage range power factor correction circuit | Thomas L. Hopkins | 2013-05-07 |
| 8373356 | System and method for a constant current source LED driver | John S. Lo Giudice, Thomas Stamm | 2013-02-12 |
| 8324825 | Method and circuit for driving a low voltage light emitting diode | Clifford J. Ortmeyer, II | 2012-12-04 |
| 8305004 | Apparatus and method for constant power offline LED driver | — | 2012-11-06 |
| 7425803 | Method and circuit for driving a low voltage light emitting diode | Clifford J. Ortmeyer, II | 2008-09-16 |
| 7301298 | Back EMF detection circuit and method for a sensorless brushless DC (BLDC) motor | Dennis C. Nolan | 2007-11-27 |
| 7242175 | Determining rotation of a freewheeling motor | Thomas L. Hopkins | 2007-07-10 |
| 7102307 | Circuit and method for improved back electromotive force detection | — | 2006-09-05 |
| 6633145 | Circuit for improved back EMF detection | Dennis C. Nolan, Kwan A. Haughton, Thomas L. Hopkins | 2003-10-14 |