Power amplifier device and power amplifier circuit thereof

摘要

The present invention relates to a power amplifier apparatus and power amplifier circuit, and the power amplifier circuit uses the Doherty circuit structure, and uses a high voltage heterojunction bipolor transistor (HVHBT) power amplifier to achieve a Carrier amplifier of the Doherty circuit structure, and uses lateral double-diffused metal oxide semiconductor (LDMOS) to achieve a Peak amplifier. The power amplifier apparatus and power amplifier circuit in the present invention improves the efficiency of the power amplifier.

主权项

1. 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.