| 摘要 |
PROBLEM TO BE SOLVED: To specify such capability that can deal with changes in many characteristics of a magnetic recording system by programming a write equalization circuit. SOLUTION: A programmable write equalization circuit includes a first digital clock that is used as a reference to indicate data rate, a second digital clock used to indicate write equalization quantization, a look-up table used to store waveforms used in equalizing the input from the first digital clock domain to the second digital clock domain, a counter used to indicate the number of bits within the look-up table that are to be used for each translation, a polarity detector used to detect the current state of the input data, a non- return-to-zero (NRZ) filter used to indicate the placement of data translations and non-translations, and a software interface including programmable registers to control each one of the parameters within the equalizing circuit. COPYRIGHT: (C)2003,JPO
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