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:
Feb. 14, 2006
Filed:
Jun. 03, 2003
Geoffrey Shippee, La Jolla, CA (US);
Geoffrey Shippee, La Jolla, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
Disclosed is a method and apparatus for removing DC offsets in a ZIF radio device, the method including the steps of converting a signal to digital samples, calculating a DC burst by capturing an entire burst and a portion of the adjacent channels, removing DC offset from the digital signal, rotating out frequency error from the digital signal, and performing channel filtering of the digital signal. The system includes a digital DC offset removal circuit, which includes an analog to digital converter, a channel filter connected to the converter, and a rotator system that is connected to the channel filter input and output. The rotator system includes a DC estimator connected to the channel filter input, a DC offset removal component connected to the DC estimator, and a rotator connected to the DC offset removal component, the output of the rotator being connected to the channel filter input.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile