Device and method for generating synchronous numeric signals with phase-delay minimization in control systems with open-loop compensation

A method for synchronizing numeric signals, comprising the steps of:

• generating a numeric reference signal having a first frequency and a first period and including a plurality of reference periods;
• and
• generating an internal numeric signal (X0, X1, . . . , XJ) having a second frequency and a second period (TDEC);
• predicting estimated samples (S′ACC, S″ACC), with a third period (TBS) and a third frequency higher than said first frequency and said second frequency, by using a current sample (XJ) and a predetermined number of former samples (XJ−1, XJ−2) of said internal numeric signal (X0, X1, . . . , XJ);
• and
• selecting one among said estimated samples (S′ACC) in each of said reference periods.

A device for generating synchronous numeric signals, comprising:

• a first signal generator that supplies a numeric reference signal having a first frequency and including a plurality of reference periods;
• a second signal generator that generates internal numeric signal having a second frequency;
• a predictor coupled to the first and second signal generators, the predictor being structured to generate, with a third frequency higher than the first frequency and the second frequency, estimated samples correlated to a current sample and a predetermined number of former samples of the internal numeric signal;
• the predictor including a selector that selects one among the estimated samples in each reference period under control of the first signal generator, the selected estimated samples together forming a synchronized numeric signal.

A device for controlling the reading of a computer storage medium by a read unit, comprising:

• a control unit that supplies a numeric reference signal having a first frequency and including a plurality of reference periods;
• a sensor unit having an input coupled to output of the control unit and an output coupled to the input of the control unit, the sensor unit being structured to generate a synchronized numeric signal that is used by the control unit to adjust a position of the read unit with respect to the computer storage medium, the sensor unit including:
• a signal generator that generates an internal numeric signal corresponding to an acceleration imparted to the read unit, the internal numeric signal having a second frequency, and
• a predictor coupled to the control unit and signal generator, the predictor being structured to generate, with a third frequency higher than the first frequency and the second frequency, estimated samples correlated to a current sample and a predetermined number of former samples of the internal numeric signal;
• the predictor including a selector that selects one among the estimated samples in each reference period under control of the control unit, the selected estimated samples together forming the synchronized numeric signal.