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. 08, 2010
Filed:
Aug. 31, 2006
Masahiro Higuchi, Hyogo, JP;
Masahiro Higuchi, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A first to a fourth sampling switch (to), a first to a fourth sampling capacitance (to), and a first and a second charge redistribution switch () are provided on the input side of a differential amplifier (). A first and a second reset switch () are provided between inputs and outputs of the differential amplifier (). A positive-polarity input signal voltage (Vinp), a negative-polarity comparison reference voltage (Vrefn), a positive-polarity comparison reference voltage (Vrefp), and a negative-polarity input signal voltage (Vinn) are applied via the first to fourth sampling switches (to) to one ends of the first to fourth sampling capacitances (to), respectively. During a reset period, the reset of the differential amplifier () is released after sampling of the voltages. During a comparison period, the first and second charge redistribution switches () are caused to be in a conduction state.