Patent ID: 7362182

Claim:
A radio frequency power amplifier comprising: a control electronics providing control signals for timing of the power amplifier; a first group of drivers coupled to the control electronics and a second group of drivers coupled to the control electronics, the first group of drivers operating in response to the control signals to generate first drive signals, the second group of drivers operating in response to the control signals to generate second drive signals with a phase difference of 180° relative to the first drive signals; a first group of switches energizing a first group of primary windings in response to the first drive signals; a second group of switches energizing a second group of primary windings in response to the second drive signals; an output-summing transformer having a plurality of ferrite cores, one primary winding of the first group of primary windings and one primary winding of the second group of primary windings passing through each of the plurality of ferrite cores, the first group of primary windings passing through the plurality of ferrite cores in a first direction and the second group of primary windings passing through the plurality of ferrite cores in a second direction opposite the first direction; and a secondary output winding for connection with a load, the secondary output winding passing through the plurality of ferrite cores of the output-summing transformer.