A SIMPLE CONTINUOUS-TIME EQUALIZER FOR USE IN MAGNETIC STORAGE READ CHANNELS

A four-pole continuous-time equalizer has been developed to minimize the error rate in rigid-disk magnetic storage channels employing peak detection at high recording densities. The equalizer outperforms more complex structures proposed for this task, and is well suited for implementation as an analog CMOS active filter with low power dissipation. The filter has been designed using measured waveforms of signal and noise in different types of disk drives, and its constellation of four poles and a zero appears to be useful for several types of magnetic media.