Patent ID: 6023383
Filing Date: 2000-02-08
Classification: G11B

Abstract:
A read channel for use in a mass storage system comprising:an equalizer operable to receive and process an analog data signal and to generate an equalized signal, the equalizer operable to generate a digital data signal in response therefrom; andan error estimation circuit operable to receive and process a processed analog data signal from said equalizer, and operable to receive a positive threshold value, a negative threshold value, a positive target value and a negative target value, wherein the error estimation circuit includes a level estimator operable to generate a digital level estimation signal, and an error calculator operable to generate the analog error signal and operable to generate the digital level estimation signal corresponding to a positive band, a negative band, and a zero band by comparing a discrete value of the equalized data signal to the positive threshold value and the negative threshold value.