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Servo Scheme for Integrating Positive Error Signal Detector Disclosure Number: IPCOM000035189D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28

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Best, JS Hetzler, SR [+details]


The quality of the position error signal (PES) for a disk file servo system has a significant effect on both servo performance and capacity. One method for encoding and detecting the PES is by amplitude detection, where the PES is derived from the peak amplitudes of transitions. Theoretically, it is possible to improve the signal-to-noise (S/N) for such a system by using an integrating detector, and measuring the area under the peaks. The main problem with integration PES detection is eliminating errors due to timing. It is possible to eliminate timing errors from integrating PES detection without requiring a phase synchronization between the servo data and the clock.