Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8183806 | Back EMF sensing interface circuit | — | 2012-05-22 |
| 7518324 | Universal motor speed controller | Blake Carpenter | 2009-04-14 |
| 7301298 | Back EMF detection circuit and method for a sensorless brushless DC (BLDC) motor | Jianwen Shao | 2007-11-27 |
| 6633145 | Circuit for improved back EMF detection | Jianwen Shao, Kwan A. Haughton, Thomas L. Hopkins | 2003-10-14 |
| 6137251 | Brushless DC motor controller with speed control from zero to above based speed | Hao Huang | 2000-10-24 |
| 5905348 | Powering and control of a brushless DC motor | — | 1999-05-18 |
| 4872127 | Ripple rejection filter | — | 1989-10-03 |
| 4754407 | Digital phase synchronizer | — | 1988-06-28 |
| 4739234 | DC motor adaptive controller apparatus | David A. Bluma | 1988-04-19 |
| 4716348 | DC motor adaptive controller | David A. Bluma | 1987-12-29 |
| 4553187 | Overcurrent detection device | James A. Burns | 1985-11-12 |
| 4546424 | Compensated ramp generating circuit for controlling SCR firing | — | 1985-10-08 |