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. 06, 2010
Filed:
Oct. 22, 2008
Szu-kang Hsien, Taoyuan County, TW;
Ta-chun Pu, Kaohsiung, TW;
Szu-Kang Hsien, Taoyuan County, TW;
Ta-Chun Pu, Kaohsiung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A calibration device includes a comparison unit, a counting unit, a memory, and a compensation circuit. A residue of a sub analog-to-digital converter is compared with a first and a second voltage by the comparison unit for generating a comparison result. A number of times of the residue voltage, out of bounds defined by the first and the second voltage, is counted by the counting unit in an iperiod according to the comparison result. The number of times of the residue voltage out of the bounds in an (i−1)period is stored in the memory. A clock of the sub ADC is adjusted by the compensation circuit into a direction based on the number of times of the residue voltage out of the bounds in the iperiod and the number of times of the residue voltage out of the bounds in the (i−1)period.