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. 13, 2010
Filed:
Dec. 23, 2008
Yasuhide Kuramochi, Miyagi, JP;
Akira Matsuzawa, Kanagawa, JP;
Yasuhide Kuramochi, Miyagi, JP;
Akira Matsuzawa, Kanagawa, JP;
Advantest Corporation, Tokyo, JP;
Abstract
An A/D conversion device including a first A/D conversion section and a second A/D conversion section that each include a D/A converter that has a plurality of bit capacitors corresponding to bits of input data, a comparing section that compares a reference voltage with a difference voltage obtained by subtracting an analog input voltage from an output voltage of the D/A converter, and a control section that detects a data value of the input data at which the difference voltage is substantially the same as the reference voltage and outputs the data value as digital data according to the input voltage, and an adjusting section that serially connects the bit capacitors of the D/A converter of the first A/D conversion section and the bit capacitors of the D/A converter of the second A/D conversion section that correspond to the same bits, and adjusts a capacity of at least one of the bit capacitors so that a voltage between the two bit capacitors approaches a middle point of voltages of the two bit capacitors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile