Patent ID: 7126781

Claim:
A disk drive comprising: (a) a disk; (b) an actuator arm; (c) a head connected to a distal end of the actuator arm; (d) a voice coil motor (VCM) comprising a voice coil, the VCM for rotating the actuator arm about a pivot to actuate the head radially over the disk; and (e) a VCM driver comprising: a first pulse width modulated (PWM) H-bridge driver comprising a plurality of driver switches for driving current through the voice coil to ground; an interface for receiving: a first PWM signal for controlling a first voltage level applied across the voice coil relative to a duty cycle of the first PWM signal; and a second PWM signal for controlling a second voltage level applied across the voice coil relative to a duty cycle of the second PWM signal, wherein the first voltage level is greater than the second voltage level.