04627038 is referenced by 45 patents and cites 1 patents.

An optical disk storage unit has an improved access and tracking system in which a low speed velocity signal is derived from a differentiated position error signal. The output of the differentiator is applied to a blanking circuit which disconnects the steep slope portion of the position error signal from a sample and hold circuit. A medium speed velocity signal is derived from the integral of motor current and a high speed velocity signal is derived by digitally counting the band crossings in the position error signal.

Title
Optical disk storage unit having a servo system with different velocity inputs
Application Number
6/627774
Publication Number
4627038
Application Date
July 5, 1984
Publication Date
December 2, 1986
Inventor
Robert P McIntosh
Longmont
CO, US
Majeed Abed
Lafayette
CO, US
Agent
Woodcock Washburn Kurtz Mackiewicz & Norris
Assignee
Storage Technology Partners II
CO, US
IPC
G11B 7/085
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