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. 31, 2010
Filed:
May. 03, 2007
Joshua E. Dorevitch, Chicago, IL (US);
John J. Bozeki, Elgin, IL (US);
Paul H. Gailus, Prospect Heights, IL (US);
Mark Rozental, Gedera, IL;
Joshua E. Dorevitch, Chicago, IL (US);
John J. Bozeki, Elgin, IL (US);
Paul H. Gailus, Prospect Heights, IL (US);
Mark Rozental, Gedera, IL;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A system and method for performing baseband phase shifting in a Cartesian feedback system includes a forward path for receiving an input baseband signal having two components, and performing up-conversion to output a RF signal; a power amplifier for amplifying the RF signal output from the forward path; and a feedback path for down-converting at least a sample of the output from the power amplifier to a feedback baseband signal comprising two components, and providing the feedback baseband signal to the forward path in order to be summed with the input baseband signal at a summing junction and before the loop filter. The forward path includes a baseband phase shifter for adjusting the baseband signal output from the summing junction in order to compensate for any phase shifts induced in the system.