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:
May. 03, 2011
Filed:
Aug. 27, 2007
Kerry B. Phillips, Haverhill, MA (US);
Michael L. Hageman, Mount Vernon, IA (US);
Robert M. Fisher, Center Point, IA (US);
Paul R. Andrys, Swisher, IA (US);
Kerry B. Phillips, Haverhill, MA (US);
Michael L. Hageman, Mount Vernon, IA (US);
Robert M. Fisher, Center Point, IA (US);
Paul R. Andrys, Swisher, IA (US);
Skyworks Solutions, Inc., Woburn, MA (US);
Abstract
According to an exemplary embodiment, a transmitter system includes a power amplifier receiving a supply voltage and a supply current from a power control/current detection circuit, where the power amplifier drives a load impedance. The transmitter system further includes a power correction module configured to sample the supply current and to cause a change in a control voltage, which corrects the supply voltage in response to a change in the load impedance. The supply voltage is corrected to cause the power amplifier to have a substantially constant output power. The power correction module is further configured to output a corrected peak voltage determined by an average value of the supply current. The transmitter system further includes a predistortion module configured to determine the control voltage from a product of the corrected peak voltage and an amplitude modulation component and to output the control voltage to the power control/current detection circuit.