Patent ID: 8116700
Filing Date: 2012-02-14
Classification: H03F,H04B

Abstract:
1. A power amplifier comprising: a first transformer having a first coil to receive a first amplified signal from a first gain stage and a second coil to output the first amplified signal to an output load; a second transformer having a third coil to receive a second amplified signal from a second gain stage and a fourth coil to output the second amplified signal to the output load, wherein the second coil is coupled in series to the fourth coil at an inter-transformer node; a first matching capacitance coupled in parallel with the second coil; and a second matching capacitance coupled in parallel with the fourth coil, wherein the first matching capacitance has a greater capacitance than a capacitance of the second matching capacitance, the first and second transformers configured to output substantially equal power levels.