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:
Mar. 29, 2005
Filed:
Sep. 18, 2002
Applicant:
Masashi Oki, Tokyo, JP;
Inventor:
Masashi Oki, Tokyo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M003/00 ; H03M001/06 ;
U.S. Cl.
CPC ...
Abstract
A digital-to-analog (DA) converter includes a detector for detecting an input sampling frequency of digital data using a sampling clock and a master clock, an oversampling digital filter for oversampling the digital data on the basis of the input sampling frequency, an input sampling frequency change detector for detecting a change in the input sampling frequency, and a mute control for muting the data to be DA-converted on the basis of the detection result of the input sampling frequency change detector.