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. 01, 2012
Filed:
Feb. 19, 2008
Xiaoyu Fu, Irvine, CA (US);
Jun MA, Irvine, CA (US);
Waleed M. Younis, Foothill Ranch, CA (US);
Nabil Yousef, Foothill Ranch, CA (US);
Janakan Sivasubramaniam, Irvine, CA (US);
Edward Youssoufian, Irvine, CA (US);
Xiaoyu Fu, Irvine, CA (US);
Jun Ma, Irvine, CA (US);
Waleed M. Younis, Foothill Ranch, CA (US);
Nabil Yousef, Foothill Ranch, CA (US);
Janakan Sivasubramaniam, Irvine, CA (US);
Edward Youssoufian, Irvine, CA (US);
Newport Media, Inc., Lake Forest, CA (US);
Abstract
A technique for providing stable tracking performance to an AGC loop circuit comprises amplifying a wideband radio frequency signal; detecting signals and blockers adjacent to the radio frequency signal; lowering a gain of the radio frequency signal; mixing a local oscillator signal with the radio frequency signal; shifting a frequency of the radio frequency signal from a radio frequency to an intermediate frequency; continuously varying a gain of the intermediate frequency signal; converting the intermediate frequency signal into a digital output signal; comparing the digital output signal with predefined thresholds comprising an upper threshold and a lower threshold; switching a post mixer amplifier (PMA) to a high gain state when an input of a variable gain amplifier (VGA) is greater than the upper threshold, and switching the PMA to a low gain state when an input of the VGA is lower than the lower threshold.