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. 19, 2010
Filed:
Feb. 09, 2007
Shinichi Harigae, Kyoto, JP;
Shinichi Harigae, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A D/A converter () includes a delta-sigma modulation circuit () including a quantizer () that receives a digital signal to quantize it based on a quantization reference value, a local D/A conversion circuit () for converting an output from the delta-sigma modulating circuit to an analog signal to be outputted, and a control circuit () for correcting the quantization reference value of the quantizer. The quantization reference value is established for each of a plurality of discrete output values that the quantizer may output. The control circuit () corrects the quantization reference value to cancel any distortion that would occur in a circuit, following the delta-sigma modulation circuit () and including the local D/A conversion circuit ().