Patent ID: 9071200
Filing Date: 2015-06-30
Classification: H03F

Abstract:
1. A power module, comprising: an ET (Envelope Tracking) module, comprising: a buck converter, coupled to a work voltage, wherein the buck converter has a first input terminal for receiving a first control signal, a second input terminal coupled to a supply node, and a buck output terminal; an inductor, coupled between the buck output terminal of the buck converter and the supply node; and a capacitor, coupled between the supply node and a ground voltage; wherein the ET module is configured to supply a first adaptive supply voltage at the supply node, and the first adaptive supply voltage is determined according to the first control signal; wherein the power module further comprises: a mapping circuit, receiving a baseband signal, and generating the first control signal according to the baseband signal; wherein the mapping circuit obtains information of I/Q channel magnitude from the baseband signal.