Title :
A median peak detecting analog signal processor for hard disk drive servo
Author :
Nagaraj, Krhishnaswamy ; Lewis, Stephen H. ; Walden, Robert W. ; Offord, Glen E. ; Shariatdoust, Reza S. ; Sabnis, Jyoti A. ; Peruzzi, Robert O. ; Barner, Jeffrey R. ; Plany, Joseph ; Mento, Robert P. ; Rakshani, Vafa A. ; Hull, Richard W.
Author_Institution :
AT&T Bell Labs., Murray Hill, NJ, USA
fDate :
4/1/1995 12:00:00 AM
Abstract :
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
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; demodulation; hard discs; peak detectors; position control; servomechanisms; 0.9 micron; 80 mW; A/D converter; ADC; CMOS integrated circuit; D/A converter; DAC; analog signal processor; hard disk drive servo; median peak detector; servo demodulation; servo processor; Additive noise; Circuits; Demodulation; Hard disks; Magnetic heads; Magnetic noise; Magnetic separation; Servomechanisms; Signal detection; Signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
