A power controller was developed to provide inexpensive efficient transceivers for variable distances in mobile wireless communication products. The controller combines parallel amplification and drain modulation of the CMOS class-E power amplifier to provide high efficiency over a broad range of output powers. Drain modulation is implemented by a class-S amplifier. The power control is achieved using quarter-wavelength transmission lines. Simulations show that the amplifier achieves a maximum power-added efficiency of 47.9% with an average PAE greater than 41% over the output power’s range of 140-700mW.