Timothy A. Ferris

Disk drive employing spindle motor commutation time variation for reducing acoustic noise

Disk drive compensating for rotational vibrations, physical shocks, and thermal popping

Disk drive adjusting gain of shock detector relative to resonant frequency amplitude

Disk drive comprising a programmable inverting voltage regulator configured relative to the disk drive's mode of operation

Disk drive employing commutation phase modulation and current modulation of a spindle motor

Self-heating integrated circuit

Output capacitor current as feedback to control a hysteretic voltage regulator

Disk drive charging capacitor using motor supply voltage during power failure

Soft start sequencer for starting multiple voltage regulators

Continuous digital offset cancellation