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:
Sep. 04, 2012
Filed:
Jun. 10, 2008
Applicant:
Chinq-shiun Chiu, Hsinchu, TW;
Inventor:
Chinq-Shiun Chiu, Hsinchu, TW;
Assignee:
Mediatek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/00 (2006.01); H04B 15/00 (2006.01); H04B 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A direct conversion receiver and a DC offset cancellation method are provided. An RF module receives a transmission signal to generate an RF signal. A mixer converts the RF signal to a mixer output comprising baseband and imaginary parts. A filter module filters out the imaginary part of the mixer output and adjusts gain of the baseband part to generate a baseband signal. A calibrator performs a calibration to determine a mismatch value of the mixer. A static DC offset canceller provides a constant offset compensation according to the mismatch value; wherein the mismatch value is used to minimize component mismatching effects of the mixer.