A discrete time servo demodulation technique incorporated within a sampled amplitude read channel to demodulate embedded servo field information stored on a magnetic medium. The servo field information is transduced by a read head into an analog signal, and converted to a sequence of sample values in...http://www.google.ca/patents/US6144513?utm_source=gb-gplus-sharePatent US6144513 - Detecting servo data and servo bursts from discrete time samples of an analog read signal in a sampled amplitude read channel
