US Patent 11632089 Notch circuit and power amplifier module

A notch circuit and a power amplifier module capable of reducing self-interference in a transceiver are provided. The transceiver includes a transmitter and a receiver, and the transmitter causes self-interference to the receiver. The transmitter includes a power amplifier module and the power amplifier module includes a notch circuit and a power amplifier. The notch circuit includes an inductor and a capacitor. The power amplifier amplifies an input transmission signal to generate an output transmission signal. The inductor receives a supply voltage. An amplitude of the supply voltage varies with the first input transmission signal. The capacitor is electrically connected to the inductor. The first output transmission signal (Tx_out