Reconfigurable output matching network for multiple power mode power amplifiers

Patent metadata

Field	Value
Publication number	US-8963644-B2
Application number	US-201313849787-A
Country	US
Kind code	B2
Filing date	Mar 25, 2013
Priority date	Mar 25, 2013
Publication date	Feb 24, 2015
Grant date	Feb 24, 2015

Abstract

An impedance matching network for a radio frequency (RF) amplifier includes multiple stages connected to each other in a first to last order. A first stage produces an RF output signal, and a last stage receives an RF input signal. Each stage includes a first inductor connected to produce an output signal, a second inductor connected to receive an input signal from a next stage, a capacitor connected between the first and second inductors and a ground. In addition, each stage other than the first stage further includes a first switch to by-pass the first and second inductors, a second switch connected between the first and second inductors and the ground, and a controller for controlling, the first and second switches to select a particular power level of a set of power levels.

First claim

We claim:

1. An apparatus for matching impedances in a radio frequency (RF) amplifier, comprising:
a plurality of stages, wherein the plurality of stages are serially connected to each other in a first to last order, and a first stage produces an RF output signal, and a last stage receives an RF input signal, wherein the each stage further comprises:
a first inductor connected to produce an output signal;
a second inductor connected to receive an input signal from a next stage…

Assignees

• Mitsubishi Electric Res Lab

Inventors

• Ma Rui
• Goswami Sushmit
• Teo Koon Hoo
• Duan Chunjie

Classifications

• H03F2203/7221

  Electricity · mapped topic

• H03F3/72

  Electricity · mapped topic

• H03F3/191

  Electricity · mapped topic

• H03F2200/391

  Electricity · mapped topic

• H03F2200/421

  Electricity · mapped topic