The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1996
Filed:
May. 27, 1994
Sumihiro Okawa, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An optical disk apparatus in which data is stored in internal registers of a digital signal processor need not be saved and returned when a servo processing based on an interrupt processing routine is executed. Internal registers of the digital signal processor are allocated. At least one group of the divided internal registers is exclusively allocated to the execution of a servo signal processing interrupt routine and the other groups of internal registers are exclusively allocated to execute a system control processing. With such allocations, when a sampling interrupt occurs, servo signal processing of a focus servo signal processing and a tracking servo processing is carried out without saving data from the internal registers of the digital signal processor. After servo processing is completed, the interrupt processing routine can be ended without returning data to the internal registers