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:
Mar. 20, 2007
Filed:
Apr. 02, 2004
Applicants:
Hung C. Lin, Silver Spring, MD (US);
Weixin Kong, Germantown, MD (US);
Inventors:
Hung C. Lin, Silver Spring, MD (US);
Weixin Kong, Germantown, MD (US);
Assignee:
Maryland Semiconductor Inc., Clarksburg, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a direct conversion receiver with zero-frequency intermediate frequency (IF) signal, the DC offset and 1/f noise of the IF signal is compensated by means of double-sampling. The first period of the doubling-sampling is a calibration phase, which stores the DC offset and the 1/f noise. The second period is a signal flow phase during which the stored DC offset and 1/f noise is connected in opposition with the IF signal to cancel the DC offset and 1/f noise.