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. 03, 2004
Filed:
May. 29, 2001
Kenneth V. Buer, Gilbert, AZ (US);
U.S. Monolithics, L.L.C., Chandler, AZ (US);
Abstract
An uplink power control system and method of the present invention includes a current sensing technique for predicting the P1 dB power compression point. A DC current sensor detects the level of DC current transmitted from a control unit to an antenna unit of the system. The current measurements are analyzed to generate a theoretical prediction of amplifier linearity as the power levels are increased. The change in DC current indicates an inflection point where the amplifier no longer behaves linearly to an increase in RF power. The inflection point is found by determining the various derivatives of the DC current curve. Analyzing the derivatives not only provides an accurate and consistent assessment of the P1 dB compression point, but also provides a prediction of the output power, and thus future performance of the system.