Electrical computers: arithmetic processing and calculating – Electrical hybrid calculating computer – Particular function performed
Patent
1998-03-09
1999-12-14
Ngo, Chuong Dinh
Electrical computers: arithmetic processing and calculating
Electrical hybrid calculating computer
Particular function performed
708300, 360 46, G06J 712, G11B 509
Patent
active
060030518
ABSTRACT:
The cut-off frequency and boost value of an analog filter on a read channel is set to initial values When the data is read from a disk, the read data is subjected to PR equalization at an FIR filter. At that time, a learning function provided on the FIR filter adjusts the tap coefficient so that an equalization error may be minimized. The cut-off frequency and boost value of the analog filter are modified until the adjusted tap coefficient has gone in a permitted range. After the tap coefficient of the FIR filter has gone in the permitted range, the cut-off frequency and boost value are stored in an EEPROM so that they can be used in a normal mode.
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"Digital Data Reproduction Apparatus", Derwent abstract No. 011490160 for JP 9-219067 (1997).
Kabushiki Kaisha Toshiba
Ngo Chuong Dinh
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