Patent ID: 6731167
Filing Date: 2004-05-04
Classification: H01L,H03F,H03G

Abstract:
A high frequency power amplifier module, comprising:a high frequency power amplifier monolithically formed on a single semiconductor chip, mounted on a module and including a first input terminal, a second input terminal, a first output terminal, and a second output terminal; a first amplifying stage mounted on the module, including a transistor and adapted to amplify an output signal from the first output terminal; and a second amplifying stage mounted on the module, including a transistor and adapted to amplify an output signal from the second output terminal, wherein said high frequency power amplifier includes a first amplifying system coupled to the first input terminal and to the first output terminal, and including a first bias terminal, and a plurality of amplifying stages which are sequentially cascaded between said first input terminal and said first output terminal and each of which is coupled to the first bias terminal so as to receive a bias potential from the first bias terminal; a second amplifying system coupled to the second input terminal and to the second output terminal, and including a second bias terminal, and a plurality of amplifying stages which are sequentially cascaded between said second input terminal and said second output terminal and each of which is coupled to the second bias terminal so as to receive a bias potential from the second bias terminal; and a bias circuit including a transistor and connected to said first bias terminal and to said second bias terminal.