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. 01, 2006
Filed:
Dec. 30, 2002
Vance H. Peterson, Boca Raton, FL (US);
Daniel Edward Brueske, Fort Lauderdale, FL (US);
Vance H. Peterson, Boca Raton, FL (US);
Daniel Edward Brueske, Fort Lauderdale, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A zero intermediate frequency (ZIF) radio frequency (RF) digital mixer () includes a low noise amplifier (LNA) (), a first RF mixer stage () for mixing an RF signal from the at least one LNA with a first local oscillator signal operating a first predetermined frequency. A second RF mixer stage () is then utilized for mixing in-phase (I) and quadrature (Q) digital signals from the first RF mixer stage () with a plurality of second local oscillator signals (LO) operating at a second predetermined frequency. The invention significantly improves current drain by eliminating the need for a linear transconductance stage while still maintaining high degrees of isolation and linearity.