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:
Sep. 11, 2007
Filed:
Apr. 24, 2006
Ryoji Sakiyama, Kanagawa, JP;
Kazuhiro Kimura, Saitama, JP;
Ryoji Sakiyama, Kanagawa, JP;
Kazuhiro Kimura, Saitama, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A DA converter comprises a high-pass filter that outputs a multibit digital signal with a predetermined frequency or lower thereof attenuated if a signal level of the input multibit digital signal is less than a predetermined threshold, the high-pass filter outputting the multibit digital signal without attenuation if the signal level is at the threshold or higher; a ΔΣ modulator that performs ΔΣ modulation of the signal output from the filter unit; a dynamic element matching circuit that divides the signal output from the ΔΣ modulator to a plurality of signals; and a plurality of internal DA converters that convert the plurality of signals output from the dynamic element matching circuit to an analog signal.