Patent ID: 7088536
Filing Date: 2006-08-08
Classification: G11B

Abstract:
1. A data reproduction apparatus which reproduces magnetically recorded data using a magnetoresistive head comprising: a high-pass filter adapted to receive an input signal and to extract an output signal from said magnetoresistive head; wherein the input signal has a thermal asperity noise portion with a leading edge duration of approximately one microsecond and a falling edge duration of approximately between 1 microsecond and 4 microseconds; a plurality of equalizers for receivinig the output signal and enabling a signal equivalent to that of the recorded data to be reproduced: a low-frequency component correction circuit for performing low-frequency component correction on the signal outputted from the plurality of equalizers; an automatic gain control (AGC) amplifier for receiving the corrected extracted signal and processing the corrected extracted signal; a phase lock loop means for receiving the corrected extracted signal from the AGC amplifier and extracting a clock signal from the corrected extracted signal; and an analog-to-digital (A/D) converter for receiving the corrected extracted signal from the AGC amplifier and for receiving the clock signal from the phase lock loop means and for producing a digital signal.