Devices and methods for performing dynamic sampling of a back
electromotive force (BEMF) measurement are provided. A device has
hardware, including a voice coil motor (VCM) for receiving a VCM command
signal and a correction circuit, for obtaining the VCM command signal and
a coil voltage measurement from the hardware, where the correction
circuit removes a transient voltage measurement due to a change in the
VCM command signal from the coil voltage measurement and outputs an
estimated BEMF measurement.