Patent Number: 6,167,011

Title: Processing of disc-drive pickup signals

Abstract: Processing of disc-drive pickup signals in a manner that maintains an approximate quadrature relationship. Second order matching filters (353, 303) process pickup signals to remove high frequency components and maintain an approximate quadrature relationship.

Inventors: Sun, deceased; Kai C. K. (late of Saratoga, CA), Grimsley; John L. (Los Altos, CA)

Assignee: Oak Technology, Inc.

International Classification: G11B 21/08 (20060101); G11B 7/085 (20060101); G11B 7/09 (20060101); G11B 007/09 ()

Expiration Date: 12/26/2017