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:
Aug. 07, 2012
Filed:
Oct. 09, 2009
Miguel Chanca, Valencia, ES;
Ronan Casey, Cork City, IE;
Patrick Crowley, Mungret, IE;
Muhammad Khan, Douglas, IE;
Philip Quinlan, Glounthaune, IE;
Miguel Chanca, Valencia, ES;
Ronan Casey, Cork City, IE;
Patrick Crowley, Mungret, IE;
Muhammad Khan, Douglas, IE;
Philip Quinlan, Glounthaune, IE;
Analog Devices, Inc., Norwood, MA (US);
Abstract
Embodiments of a system for calibrating the image rejection of a receiver include an image-rejection correction circuit that modifies the gain and phase of a first channel of a baseband image signal. The image-rejection correction circuit may include a summing circuit and first and second variable-gain elements. In one implementation, a filter receives a corrected first channel from the image-rejection correction circuit and an unmodified second channel of the image signal, while a controller analyzes power measured at the output of the filter, and adjusts the variable-gain elements to reduce the power of the image signal.