202 and 204 can be selected so that their parallel combination is 50 ohms for example as illustrated in fig2 load resistances 210 and 212 can each be 100 ohms making the parallel combination 50 ohms in some embodiments the load resistances seen at output pad 208 for the top and the bottom switches 202 and 204 can additionally or alternatively be chosen to be equal e g each 100 ohms so that the top and bottom switches 202 and 204 deliver equal output power in some embodiments the load voltages for the top and bottom switches 202 and 204 can be selected to be identical or similar in swing and phase as shown in fig1 b to minimize cancellation during current combining as also shown in fig1 b the drain voltage swing of the top device can be twice that of the bottom device in some embodiments another example of waveforms v top and v bot that can be produced at the drains of switches 202 and 204 respectively in response to a sinusoidal input signal in accordance with some embodiments is shown in fig3 in some embodiments two such class e power amplifier unit cells as shown in fig2 can be current combined as shown in fig4 as illustrated in fig4 two quarter wave transmission lines 402 and 404 can be used to equally split the input power from an input pad 406 to two class e amplifiers 408 and 410 in some embodiments each of amplifiers 408 and 410 can.