Patent ID: 11870401
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A power amplifier module, comprising:
a substrate having a ground pattern layer;
a power input terminal;
a first power amplifier on the substrate, the first power amplifier having a collector and an emitter;
a second power amplifier on the substrate, the second power amplifier having a collector and a second input terminal connected to the collector of the first power amplifier;
a first capacitor connected to the collector of the second power amplifier;
a first conductive pattern connected between the first power amplifier and the ground pattern layer;
a second conductive pattern connected between the first capacitor and the ground pattern layer; and
a third conductive pattern connected between the emitter of the first power amplifier and the ground pattern layer, and between the first capacitor and the ground pattern layer,
wherein the first power amplifier is configured to operate according to an envelope tracking system via the power input terminal.