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AssigneeInternational Business Machines Corporation
InventorEarl A. Cunningham
Estimating the term…
A peak detector for extracting pulses in a magnetoresistive sensor circuit while suppressing the recovery transients created by thermal asperities. The disclosed peak detector circuit is a simplified variation of the standard magnetoresistive sensor peak detector circuit. The signal differentiation is performed ahead of the usual amplification to remove transient pulse amplitudes before they can affect the AGC gain. The resulting differentiated signal is processed by a modified amplitude qualification circuit to extract data output pulses. The thermal asperity transient recovery period is eliminated without additional circuit complexity, leaving only the initial thermal asperity pulse effects to be corrected by any suitable relatively simple error correction code (ECC).
A pulse detecting circuit for suppressing transient disturbances in an input signal waveform having amplitude and frequency characteristics including a stream of pulses, said circuit comprising:
In a magnetoresistive sensor signal processing circuit, a peak detector for generating an output data pulse in response to detection of a pulse peak in an input signal from a magnetoresistive sensor, said pulse detector comprising:
A method for suppressing thermal asperity transients while detecting a data pulse in a magnetoresistive sensor signal, said method comprising the steps of:
Dependencies are inferred from the claim text.