Differential source follower driven power amplifier

    公开(公告)号:US09985591B2

    公开(公告)日:2018-05-29

    申请号:US15421282

    申请日:2017-01-31

    IPC分类号: H03F1/56 H03F3/193 H03F3/21

    摘要: A power amplification device includes a power amplifier core stage and a power amplifier driver stage. The power amplifier driver stage receives a radio frequency signal to be amplified by the power amplification device. The power amplifier driver stage includes a first source follower input transistor and a first current source transistor. A source of the first source follower input transistor is coupled to a drain of the first current source transistor. The source of the first source follower input transistor is directly coupled to the power amplifier core stage to drive the power amplifier core stage. An input match and passive voltage gain device is coupled to the power amplifier driver stage to generate a voltage gain at an input of the power amplifier driver stage. A first bias source is configured to generate a first bias signal to bias the power amplifier driver stage.