公开(公告)号：US09065389B2

公开(公告)日：2015-06-23

申请号：US13975535

申请日：2013-08-26

Applicant: ADVANCED SEMICONDUCTOR ENGINEERING INC.

Inventor： Jaw-Ming Ding ,  Hsin Chin Chang

IPC: H03F3/04 ,  H03F3/19 ,  H03F1/30

CPC classification number: H03F3/19 ,  H03F1/302 ,  H03F2200/18 ,  H03F2200/447

Abstract: A radio frequency (RF) power amplifier with no reference voltage for biasing is disclosed. The RF power amplifier includes a three-terminal current source circuit, a current mirror circuit and an output-stage circuit. The three-terminal current source circuit receives a first system voltage and accordingly outputs a first current and a second current, and a source voltage exists between a first output terminal of the first current and a second output terminal of the second current. The current mirror circuit receives the first current and the second current and accordingly generates a bias current. The output-stage circuit receives the bias current so as to work at an operation point. The RF power amplifier utilizes the source voltage of the three-terminal current source circuit so the first system voltage is between a first voltage and a second voltage, and then the output-stage circuit outputs an output current which does not vary with a deviation of the first system voltage also with temperature compensation.

Abstract translation: 公开了一种无偏压参考电压的射频（RF）功率放大器。 RF功率放大器包括三端电流源电路，电流镜电路和输出级电路。 三端电流源电路接收第一系统电压，并相应地输出第一电流和第二电流，并且源电压存在于第一电流的第一输出端和第二电流的第二输出端之间。 电流镜电路接收第一电流和第二电流，从而产生偏置电流。 输出级电路接收偏置电流，以便在操作点工作。 RF功率放大器利用三端电流源电路的源极电压，使得第一系统电压在第一电压和第二电压之间，然后输出级电路输出不随着 第一个系统电压也带有温度补偿。