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:
May. 15, 2012
Filed:
May. 13, 2010
Applicants:
Chun-ta Ho, Kaohsiung, TW;
Chuan-ping Tu, Hsinchu County, TW;
Inventors:
Chun-Ta Ho, Kaohsiung, TW;
Chuan-Ping Tu, Hsinchu County, TW;
Assignee:
Realtek Semiconductor Corp., Hsinchu, TW;
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A background self-calibrated DAC is presented. A virtual-short theory, applicable to input/output terminals of an operational amplifier, is periodically employed so as to self-calibrate a current source serially connected with an equivalent resistor, and the DAC using the same. The DAC does not require an additional self-calibration period, and digital-to-analog conversion thereof can be realized in merely a small amount of die area. Correspondingly, a compact and high-speed current steering DAC can be realized.