Generation and Amplification of Substantially Constant Envelope Signals, Including Switching an Output Among a Plurality of Nodes

An apparatus for power amplification, comprising:

• circuitry that generates a plurality of control signals;
• circuitry that receives said control signals and a frequency reference signal, and that generates a plurality of substantially constant envelope signals using said frequency reference signal and said control signals;
• a multiple-input single-output (MISO) amplifier that amplifies and combines said substantially constant envelope signals to generate an output signal;
• a plurality of output nodes;
• and
• a switch that switches said output signal to one of said output nodes.

A method of power amplification, comprising:

• generating a plurality of control signals;
• generating a plurality of substantially constant envelope signals using a frequency reference signal and said control signals;
• amplifying and combining said substantially constant envelope signals using a multiple-input single-output (MISO) amplifier to generate an output signal;
• and
• switching said output signal to one of a plurality of output nodes.