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:
Jun. 01, 2004
Filed:
Feb. 08, 2001
Donald M. Yochem, Buffalo Grove, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
This invention is a method of carrier suppression tuning of a wireless communication device ( ) utilizing a quadrature modulator ( ) in a transmission path (102). A power detector ( ) and a processor ( ) are coupled to the ends of the transmission path ( ) to provide feedback to the quadrature modulator ( ) and, thus, minimizes carrier feedthrough. For this invention, the transmission path ( ) of the device ( ) is enabled and “I” and “Q” DC offset values are set to default values. Then, output voltages from the power detector ( ) are sampled and the “I” DC offset value is adjusted based on the sampled voltages. Similarly, output voltages from the power detector ( ) are sampled and the “Q” DC offset value is adjusted based on the sampled voltages. These steps of sampling and adjusting for the “I” and “Q” DC offset values are repeated until the power detector ( ) produces an output that is less than a predetermined threshold value.