Realtek Semiconductor Inc.

Ya-Wen Yang

Po-Chih Wang

A multi-mode power amplifying circuit, and a multi-mode wireless transmission module and method thereof are provided. The multi-mode wireless transmission module includes the multi-mode power amplifying circuit and an antenna. In the multi-mode power amplifying circuit and the antenna, a first power amplifier is electrically connected between a signal input end and a first impedance matching circuit, and an output end of the first impedance matching circuit is electrically connected to the antenna. A second power amplifier is electrically connected to the signal input end, and a second impedance matching circuit is electrically connected between the second power amplifier and the first impedance matching circuit. A switching circuit is electrically connected to an input end of the second impedance matching circuit. The switching circuit switches on-off corresponding to an operation of the first power amplifier and an operation of the second power amplifier.

Multi-mode power amplifying circuit, and multi-mode wireless transmission module and method thereof

A radio frequency (RF) power amplifier is disclosed. The RF power amplifier includes an impedance transformation circuit, a current unit gain amplifier, and an output match circuit. The impedance transformation circuit receives a first input power signal and outputs a second input power signal correspondingly, wherein the impedance transformation circuit transforms an input impedance to an output impedance according to an impedance matching parameter for increasing power added efficiency of a pre-stage circuit. The current unit gain amplifier provides a linear transimpedance so as to transmit an input current to an output impedance, and then generate a linear output power for increasing power added efficiency of the current unit gain amplifier, wherein the impedance matching parameter is determined by a first system voltage, a second system voltage, and a predetermined power gain value.

Growing community of inventors

Hsinchu, Taiwan

Ya-Wen Yang