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:
Aug. 17, 2010
Filed:
Jan. 02, 2008
Ren-chieh Liu, Chang-Hua Hsien, TW;
Ren-Chieh Liu, Chang-Hua Hsien, TW;
Realtek Semiconductor Corp., Science Park, HsinChu, TW;
Abstract
A DC offset calibration apparatus includes a first adjustment unit, a first offset calibration circuit, a second adjustment unit, and a second offset calibration circuit. The first adjustment unit adjusts a first input signal to generate a first output signal according to a first offset calibration signal. The first offset calibration circuit is coupled to the first output signal and the first adjustment unit for determining the first offset calibration signal according to the first output signal and predetermined threshold value. The second adjustment unit adjusts a second input signal to generate a second output signal according to a second offset calibration signal. The second offset calibration circuit is coupled to the second output signal and the second adjustment unit for determining the second offset calibration signal according to the second output signal and the predetermined threshold value. The first and the second input signals are a differential signal pair.