Patent ID: 9331638
Filing Date: 2016-05-03
CPC Classification: H03F

Claim Text:
1. A Doherty power amplifier apparatus, comprising: a drive amplifier circuit, a power splitter, a carrier amplifier circuit, a peak amplifier circuit and a power combiner, one end of the power splitter connected to the drive amplifier circuit, the carrier amplifier circuit and the peak amplifier circuit connected in parallel between the other end of the power splitter and the power combiner, wherein, the carrier amplifier circuit comprises one or more parallel carrier amplification branches, each carrier amplification branch comprises a multi-stage carrier amplifier apparatus, and the multi-stage carrier amplifier apparatus is used for achieving multi-stage carrier amplification; and the peak amplifier circuit comprises one or more parallel peak amplification branches, each peak amplification branch comprises a multi-stage peak amplifier apparatus, and the multi-stage peak amplifier apparatus is used for achieving multi-stage peak amplification; wherein, the multi-stage peak amplifier apparatus comprises N wherein, the multi-stage carrier amplifier apparatus comprises N a power distribution of the peak amplification branch(es) and the carrier amplification branch(es) is regulated within a large range by changing a static offset voltage of the first integrated circuit and/or the second integrated circuit to solve a problem of reduced efficiency and linearity caused by the discretion of the input standing waves of the power amplifier during batch manufacture of the Doherty power amplifier.