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:
May. 11, 1999
Filed:
Jul. 11, 1997
Applicant:
Inventor:
Richard A Relph, Santa Clara, CA (US);
Assignee:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04F / ;
U.S. Cl.
CPC ...
368113 ; 368120 ; 327277 ; 331 57 ;
Abstract
A floating point timer comprises a floating point counter using a reference clock signal generated by a digital ring oscillator having an oscillation period that matches the delay of the worst case path through the floating point counter. The digital ring oscillator utilizes a digital delay line which repeatedly delays a bit for the oscillation period and feedback logic to reapply the delayed bit for another oscillation. The digital delay line includes enough high-precision digital delay elements whereby the oscillation period is at least as great as that of the delay of the worst case path through the floating point counter.