Patent ID: 8797099

Claim:
A power amplifier apparatus, comprising one or more driver stage power amplifier circuits in a series connection and a final stage power amplifier circuit connecting with an output end of last one driver stage power amplifier circuit, wherein the driver stage power amplifier circuit uses a Doherty circuit structure; wherein the apparatus is implemented in a following way: determining a model number of a power amplifier used by a final stage carrier amplifier; comparing, analyzing and determining a Doherty structure to be used; determining a model number of a power amplifier used by a final stage peak amplifier; according to gain of final stage, determining a model number of a power amplifier used by a driver stage carrier amplifier and a model number of a power amplifier used by a driver stage peak amplifier; completing a matching design of power amplifiers of the final stage and driver stage and a design for parts of power divider and power combiner in a block diagram.