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A median peak detecting analog signal processor for hard disk drive servo

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12 Author(s)
Nagaraj, K. ; AT&T Bell Labs., Murray Hill, NJ, USA ; Lewis, S.H. ; Walden, R.W. ; Offord, G.E.
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An analog signal processor for hard disk drive servo is described. It performs servo demodulation by means of median peak defection which provides immunity against additive as well as multiplicative noise from the medium, unlike conventional methods. A novel circuit configuration has been employed to implement the median peak detector in an area and power efficient manner. The entire servo processor that includes the demodulator and 10 b A/D and D/A converters has been integrated into a single CMOS integrated circuit

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Solid-State Circuits, IEEE Journal of  (Volume:30 ,  Issue: 4 )