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:
Jul. 21, 1998
Filed:
Nov. 14, 1996
John Russel Melton, Bolingbrook, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An RF power amplifier (100) includes a feedback loop with a loop phase, and is arranged for amplifying an RF signal (1). During an initial stabilizing mode (201), the amplifier is stabilized by applying a baseband reference signal (210) input via a reference input terminal to the feedback loop and adjusting the loop phase to an optimum value. Thereafter, during an amplifying mode (202), the RF signal is input via an RF input terminal and amplified while maintaining the loop phase at the optimum value. The feedback loop contains a baseband in-phase (I) path and a baseband quadrature (Q) path, and the baseband reference signal may be applied to the I path, the Q path, or both. The stabilizing and amplifying modes are fixed in duration and comprise a periodic cycle that is repeated. The input RF signal is substantially null during the stabilizing mode.