A digital servo architecture with 8.8 bit resolution of position error signal for disk drives

A new digital servo signal processing architecture with 8.8 bit resolution of position error signal for disk drives is presented. It achieves an 8.8 bit resolution of the position error signal by use of a 6 bit ADC (analog to digital converter) for the data channel. This new architecture uses only a full wave rectifier and a divider. The burst signal is rectified in the analog domain before being sampled by the clock, which has a higher frequency than the servo frequency, in the ADC.