Adaptive pole-zero cancellation for wide bandwidth magnetoresistive pre-amplifier
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United States of America Patent
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May 27, 1997
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N/A
app pub date -
Oct 19, 1995
filing date -
Oct 19, 1995
priority date (Note) -
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Abstract
An apparatus for the adaptive cancellation of at least a first pole frequency in a magnetoresistive (MR) head device includes a preamplifier coupled to first and second terminals of the MR head. A signal at a pole frequency produced by the preamplifier is cancelled by a zero boost frequency signal generated as a result of a signal across the MR head read by a differential amplifier. The zero boost frequency signal is passed to the read channel coming from the MR head to cancel the pole.
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