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:
Jan. 13, 2009
Filed:
Jun. 21, 2007
Yasumasa Hayakawa, Gunma-ken, JP;
Akira Yoshida, Ota, JP;
Taichiro Kawai, Kiryu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A combined AD/DA converting apparatus includes an input signal selection circuit configured to select one analog signal out of a plurality of analog input signals based on an input selection signal; an input sample hold circuit configured to sample and hold the analog input signal; a DA converter configured to convert a digital signal into an analog signal; a comparator circuit configured to output a comparison signal that indicates a size relation between the analog input signal and the analog signal; a sequential comparison register configured to define sequentially each place of a digital signal stored in the register based on the comparison signal; and a selection circuit configured to output the digital signal to the DA converter when the conversion selection signal indicates AD conversion, and to output the digital input signal to the DA converter when the conversion selection signal indicates DA conversion.