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:
Jul. 07, 2009
Filed:
Mar. 28, 2007
Takamasa Satoh, Tokyo, JP;
Koichi Hidaka, Nakai-machi, JP;
Ryozo Yoshino, Nakai-machi, JP;
Advantest Corporation, Tokyo, JP;
Hitachi Information & Communication Engineering, Ltd., Kanagawa, JP;
Abstract
The present invention is related to a D/A conversion device, it is provided with a first D/A conversion circuit which receives input of digital data composed of plural bits and outputs a corresponding electric output signal, and a second D/A conversion circuit which receives input of a correction code for the digital data and which outputs a corresponding electric correction signal, wherein the first and second D/A conversion circuits are connected to each other at their respective output terminals so that the electric output signal is corrected by the electric correction signal. The D/A conversion device comprises: storing meansfor storing correction codes each for one bit of the digital data, the correction codes being determined in correlation with the first D/A conversion circuitand calculating meansfor performing serial entry and addition of the correction codes each for one bit of the digital data, and outputting a correction code for all bits of the digital data.