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:
Jun. 19, 2012
Filed:
Mar. 03, 2009
Shinichi Ogita, Osaka, JP;
Akira Kawabe, Osaka, JP;
Takayasu Kito, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In each stage, a digital signal corresponding to a portion of bits is generated from an input analog signal, an analog reference signal is generated by a DA conversion portion () based on the digital signal, and a remainder operation on the input analog signal is performed by a remainder operation portion (). A test can be performed by supplying a test signal in place of the input analog signal. A control portion () performs control, in a test mode, to stop supply of the input analog signal to the remainder operation portion and stop the reference voltage selection of the DA conversion portion based on the digital signal, while performing reference voltage selection based on a DA conversion control signal for use in testing, thereby supplying the remainder operation portion with the test signal composed of predetermined one of the reference voltages, in place of the input analog signal, and the analog reference signal. A test signal can be input with a small-scale configuration, without providing a test signal line separately from a line used for normal operation.