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:
Apr. 04, 2006
Filed:
Jun. 15, 2001
Patrick J. Murphy, Cedar Rapids, IA (US);
Gunther B. Frank, Cedar Rapids, IA (US);
Dennis Hoffman, Cedar Rapids, IA (US);
Carlos J. Chavez, Marion, IA (US);
Patrick J. Murphy, Cedar Rapids, IA (US);
Gunther B. Frank, Cedar Rapids, IA (US);
Dennis Hoffman, Cedar Rapids, IA (US);
Carlos J. Chavez, Marion, IA (US);
Rockwell Collins, inc., Cedar Rapids, IA (US);
Abstract
A direct conversion quadrature receiver and method are provided according to the invention. The receiver according to one embodiment includes a primary local oscillator (LO) that down-converts a received RF signal to a quadrature intermediate frequency (IF) signal. The receiver further includes a dithering controller responsive to the quadrature IF signal generated by the primary LO. The dithering controller communicates a feedback signal back to the primary LO. The feedback signal controls the primary LO in order to offset down-conversion of the RF signal by the quadrature IF signal. The dithering controller offsets the primary LO from a zero-IF signal in order to reduce a phase and gain error of the quadrature IF signal.