Patent ID: 6130793
Filing Date: 2000-10-10
Classification: G11B

Abstract:
A thermal asperity compensation method comprising the steps of:(a) converting an analog signal reproduced from a magnetic recording medium into a digital signal using an analog-to-digital converter;(b) using a first digital filter to isolate a D.C. component caused by thermal asperity included in the analog signal and subtract said D.C. component from said digital signal after said step (a); and(c) supplying said D.C. component isolated in step (b) in a negative feedback to said analog-to-digital converter and subtracting a signal corresponding to said D.C. component from an input of said analog-to-digital converter and supplying said digital signal from which said D.C. component has been subtracted in step (b) to a second digital filter for equalizing said digital signal.