Certance LLC

William C Hung

An asymmetry compensator for measuring and correcting of asymmetry in magnetic recording devices. The magnetic recording device includes a read head, an asymmetry compensator, a data decoder, and an analog-to-digital converter. The read head produces a read data signal that contains potential errors due to asymmetry. The read data signal is processed into a compensated data signal by the asymmetry compensator. The asymmetry compensator includes a power of two squaring device, a gamma amplifier, and a summing junction connected in a feed forward manner. The gamma amplifier uses an approach involving, for a positive isolated pulse, the amplitude of the positive pulse and the undershoot and, for a negative isolated pulse, the amplitude of the negative pulse and the overshoot. The approach further involves probabilities and weights in a weighted average to account for any variations with frequency. The approach may be performed in either the analog or digital domain.

Growing community of inventors

Irvine, CA, United States of America

William C Hung