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:
Apr. 06, 2010
Filed:
Jun. 16, 2008
Kengo Okada, Kanagawa, JP;
Kengo Okada, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Abstract
Disclosed is a D/A converter including: a delta-sigma modulator for subjecting a digital signal to delta-sigma modulation; a pulse-width modulator for outputting a pulse-width-modulated signal having a pulse width conforming to a digital value that is output from the delta-sigma modulator; and a distortion detector for detecting a distortion component produced in the pulse-width modulator. The distortion detector includes a delay controller for receiving the digital signal and correcting the phase thereof; a second delta-sigma modulator; a second pulse-width modulator; a subtractor for subtracting the output of the second delta-sigma modulator from the output of the second pulse-width modulator; and a second subtractor for subtracting the output signal of the first subtractor from the output signal of the delay controller.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile