Patent ID: 7821339
Filing Date: 2010-10-26
Classification: H03F

Abstract:
1. A differential Radio Frequency (RF) power amplifier comprising: a plurality of differential RF cascode power amplifiers coupled in parallel, each comprising: a positive transconductance stage with a first differential RF signal input; a positive cascode stage having at least one cascode transistor, the positive cascode stage coupled in series with the positive transconductance stage between a voltage node and ground, the positive cascode stage having a first differential RF signal output and at least one bias input to the at least one cascode transistor; a negative transconductance stage with a second differential RF signal input; and a negative cascode stage having at least one cascode transistor, the negative cascode stage coupled in series with the negative transconductance stage between the voltage node and ground, the positive cascode stage having a second differential RF signal output and at least one bias input to the at least one cascode transistor; and the plurality of parallel differential RF cascode power amplifiers residing adjacent one another in a single semiconductor substrate such that: the positive transconductance stage of a first differential RF cascode power amplifier resides adjacent a negative transconductance stage of a second differential RF cascode power amplifier; and the positive cascode stage of the first differential RF cascode power amplifier resides adjacent a negative cascode stage of a second differential RF cascode power amplifier.