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:
Feb. 11, 2003
Filed:
Jun. 27, 2001
Applicant:
Inventors:
Dan Q. Tu, San Diego, CA (US);
Louis F. Coffin, III, Mountain View, CA (US);
Assignee:
Webtv Networks, Inc., Mountain View, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 2/100 ;
U.S. Cl.
CPC ...
H03B 2/100 ;
Abstract
A numerically controlled oscillator that generates an accurate digital representation of a repeating waveform such as a sinusoidal wave. Based on the desired output frequency, multiple samples are calculated from multiple cycles of the repeating waveform. As samples are taken, they are stored in a memory location until a sufficient number of samples are accumulated. After the samples are accumulated, they are output in a specified order, which generates an accurate digital representation of a sinusoidal wave at the desired output frequency.