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. 21, 2006
Filed:
Oct. 31, 2002
Wolfram Kluge, Dresden, DE;
Lutz Dathe, Dresden, DE;
Jörg Hönig, Dresden, DE;
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
In a direct conversion radio frequency receiver, an automatic gain control is implemented that allows changing the operation mode of a filter unit in the baseband section of the receiver such that in a first operation mode filter capacities are selected to provide desired output signal characteristics, whereas in a second operation mode the filter settling time is significantly reduced in order to speed up gain adaptation and to improve gain loop stability. In one embodiment the cut-off frequency of a high pass filter and the Q-factor of a subsequent low pass filter are increased and decreased respectively upon changing the gain setting of a variable gain amplifier to accelerate settling of the filter.