METHOD AND DEVICE FOR COMPENSATING THERMAL ASPERITY AND DIRECT ACCESS STORAGE, ON DATA DETECTION IN DATA CHANNEL

摘要

PURPOSE: To obtain a thermal asperity compensating method and device for data detection in a partial response maximum likelihood(PRML) data channel. ;CONSTITUTION: A PRML data channel contains an A/D converter (ADC) 56 having a normal operating range, filter 58, and a gain and timing control device 60 connected to ADC. With a thermal asperity detected, a thermal asperity recovery mode is made in accordance with the thermal asperity. The gain and timing control device 60 is held, with the normal operating range of ADC 56 adjusted in accordance with the thermal asperity recovery mode. In addition, an AC combination polar frequency is increased corresponding to this thermal asperity recovery mode.;COPYRIGHT: (C)1994,JPO