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:
Oct. 16, 2001
Filed:
Feb. 02, 2000
Steven J. Laureanti, Lewisville, TX (US);
Mikko Nieminen, Irving, TX (US);
Nokia Networks Oy, Espoo, FI;
Abstract
A power amplifier to process an input signal includes an amplifying device operating at a quiescent point and a bias network that varies the quiescent point according to a frequency of the input signal. In a variant of this power amplifier, the bias network includes a compensation circuit to provide a bias signal that varies according to a frequency of the input signal and a bias circuit to vary the quiescent point according to the bias signal. In an alternative embodiment of the invention, a method of making a power amplifier includes steps of measuring a gain performance of an amplifying device at a plurality of frequencies, determining a desired quiescent point of the amplifying device at each frequency of the plurality of frequencies, and constructing a bias network that varies an operating quiescent point of the amplifying device according to a frequency of the input signal so that the operating quiescent point approximates the desired quiescent point at each frequency of the plurality of frequencies. In a variant of this method the step of determining determines the desired quiescent point to be an operating quiescent point at which the amplifying device dissipates a minimum power that is consistent with providing a gain performance within a specified range of gains.