Issued Patents All Time
Showing 51–75 of 97 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7764054 | Voltage regulator with current-mode dual-edge width modulation and non-linear control | Yigang Guo | 2010-07-27 |
| 6603361 | Method and apparatus for maintaining clock accuracy at power down | — | 2003-08-05 |
| 6297603 | Circuit and method to avoid high current spikes in stator windings | — | 2001-10-02 |
| 6211727 | Circuit and method for intelligently regulating a supply voltage | — | 2001-04-03 |
| 6084378 | Variable slew rate pulse width modulation system | — | 2000-07-04 |
| 6081112 | Method and circuit for determining the velocity of a data detector mechanism of a mass storage device, or the like, using a BEMF voltage in the associated voice coil | Paolo Menegoli | 2000-06-27 |
| 6064539 | Method of retracting a read and/or write head for parking | Michael W. Null, Karl M. Schlager | 2000-05-16 |
| 5869946 | PWM control of motor driver | — | 1999-02-09 |
| 5859511 | Motor with input-controlled high side driver | — | 1999-01-12 |
| 5793183 | Motor system with interrupted PWM oscillation | Rafael Lopez | 1998-08-11 |
| 5764095 | Nonlinear integrator | — | 1998-06-09 |
| 5680037 | High accuracy current mirror | — | 1997-10-21 |
| 5668449 | Motor with input-controlled high side driver | — | 1997-09-16 |
| 5656897 | Current sensing and control in brushless DC motors | Karl M. Schlager, Li-Hsin D. Lu | 1997-08-12 |
| 5614797 | Stator coil driver circuit for a brushless DC motor | — | 1997-03-25 |
| 5592345 | Feedforward circuit and method for controlling the speed of a spindle motor in a disk drive | Sandro Cerato | 1997-01-07 |
| 5572099 | Motor speed control with current limit | — | 1996-11-05 |
| 5566369 | Controlled velocity head parking circuit | — | 1996-10-15 |
| 5550497 | Power driver circuit with reduced turnoff time | — | 1996-08-27 |
| 5543697 | Circuit and method for controlling the speed of a motor | Curtis Robinson | 1996-08-06 |
| 5517095 | Method and apparatus for operating polyphase DC motors using a PWM chopping signal in zero crossing determination | Scott W. Cameron | 1996-05-14 |
| 5514939 | Circuitry for switching the body nodes of driver transistors in drive circuitry for brushless DC motors | Karl M. Schlager, Solomon Ng | 1996-05-07 |
| 5512805 | Method and apparatus for determining reverse rotation of a polyphase DC motor | Mark E. Rohrbaugh | 1996-04-30 |
| 5495154 | Method and apparatus for Kelvin current sensing in a multi-phase driver for a polyphase DC motor | — | 1996-02-27 |
| 5481167 | Amplifier and method for detecting the bemf of a coil of a polyphase sensorless DC motor | Mark E. Rohrbaugh | 1996-01-02 |