Patent ID: 6025965
Filing Date: 2000-02-15
Classification: G11B

Abstract:
A digital control within a feedback control loop of a sampling data detection channel for controlling a predetermined operating parameter of the channel in which an analog to digital converter provides digital samples of information in the channel at a predetermined channel clock rate, the digital control comprising:a parameter error extraction circuit clocked at the predetermined channel rate and connected to receive digital samples from the analog to digital converter, for extracting parameter error values from the digital samples,an averaging circuit for averaging the extracted parameter error values over an integral submultiple of the predetermined channel rate, anda parameter error processing circuit connected to the parameter error extraction circuit and clocked at the integral submultiple of the predetermined channel rate for generating and putting out digital control values within the feedback control loop for controlling the predetermined operating parameter, the parameter error processing circuit includes at least one multiplier for multiplying the averaged extracted parameter values by a loop constant, to produce a product, and an integrator for integrating the product.