Servo channel for tape drive systems

A method for operating a synchronous servo channel for a data tape drive, comprising:

• acquiring initial servo channel parameters from a sequence of signal samples output from a servo channel analog-to-digital converter (ADC) and generating control signals from the sequence of signal samples output from the servo channel analog-to-digital converter (ADC);
• generating a plurality of signals including timing information from the control signals;
• generating interpolated signal samples from the sequence of signal samples output from the servo channel analog-to-digital converter (ADC) and the plurality of signals;
• and
• generating correlation signal samples from the interpolated signal samples and the control signals.

A synchronous servo channel for a data tape drive, comprising:

• a servo reader configured to read servo bursts from a data tape;
• an anti-aliasing filter operable to output a bandlimited signal and coupled to receive a servo channel signal comprising servo bursts from the servo reader;
• an analog-to-digital converter (ADC) operable to output signal samples and coupled to receive the bandlimited signal from the anti-aliasing filter;
• an interpolation and control unit comprising:
• a monitoring and control component operable to output control signals and coupled to receive the signal samples from the ADC;
• a time-base generator operable to output a plurality of signals including timing information and coupled to receive the control signals from the monitoring and control component;
• and
• a servo channel signal interpolator having a first input coupled to receive the signal samples from the ADC and a second input coupled to receive the timing information from the time-base generator for generation of interpolated signal samples;
• and
• a dibit correlator operable to output correlation signal samples and having a first input coupled to receive the interpolated signal samples from the servo channel signal interpolator and a second input coupled to receive the control signals from the monitoring and control component.