Patent ID: 8422162
Filing Date: 2013-04-16
Classification: G11B

Abstract:
1. A servo channel for a tape drive coupled to a servo reader reading a servo pattern encoded on a recording medium, comprising: an analog-to-digital converter (ADC) receiving read servo signals from the servo pattern read by servo reader and providing sequences of servo signal samples; a monitoring and control unit coupled to the ADC and operable to select a selected reference waveform from a predetermined set of waveforms based on the sequences of servo signal samples and forward the selected reference waveform; an interpolator coupled to the ADC operable to generate interpolated servo signal samples; a correlator coupled to receive the interpolated servo signal samples from the interpolator and the forwarded selected reference waveform from the monitoring and control unit, and operable to generate correlation output samples; and computational units coupled to the correlator to receive the correlation output samples and operable to calculate position and velocity information from the correlation output samples.