Literal Corporation

Information Storage, Inc.

Steve S Popovich

James Harold Lauffenburger

Russell A Meyer

William J Stanis

Gary R Mitchell

Christopher Miller

Tzuo-Chang Lee

Self-adjusting bridging for floorboard joists

An apparatus and method for filtering intersymbol interference from an information signal generated from a storage medium. This apparatus utilizes a delay line, gain devices, summing devices, and has specified transfer functions. Furthermore, this apparatus and method can make real time adjustments in order to maintain an optimal level of filtering.

Transversal filter and method for cancelling intersymbol interference

A method and apparatus for positioning and tracking a Random Access Memory (RAM) optical head over an information storage media having a plurality of tracks formed by optically readable deformations ('pits') in the media including, a central controller, a laser diode optical-system carrying head which is movable transversely of the tracks in incremental steps for coarse positioning of the head over a selected band of tracks and a servomechanism which positions the laser's objective lens over a specifically addressed track and maintains it there until another track is addressed. Also discussed is a unique method of generating a tracking error signal as an input to the servomechanism which includes the asynchronous detection of a sector mark and the generation of an independent clocking signal from the synchronous detection of off-track pairs of pits spaced uniformly between other data in the track to produce the tracking error signal.

RAM head positioning and tracking system

Growing community of inventors

Colorado Springs, CO, United States of America

Steve S Popovich