公开(公告)号：US08922281B2

公开(公告)日：2014-12-30

申请号：US14029042

申请日：2013-09-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Wataru Takahashi ,  Toshiki Matsui ,  Jun Sakatsume

IPC: H03F1/56 ,  H03F1/02 ,  H03F3/195 ,  H03F3/21 ,  H03F3/24 ,  H03F3/72

CPC classification number: H03F1/56 ,  H03F1/0277 ,  H03F1/565 ,  H03F3/195 ,  H03F3/211 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/108 ,  H03F2200/111 ,  H03F2200/387 ,  H03F2200/429 ,  H03F2200/507 ,  H03F2203/7215 ,  H03F2203/7227 ,  H03F2203/7236

Abstract: In a power amplifier, in response to a power mode signal at a predetermined level, a first switch circuit supplies a signal to first and second amplifier devices that perform parallel operations. In response to the power mode signal at another level, the first switch circuit supplies a signal to the first amplifier device and stops supplying the signal to the second amplifier device such that the first amplifier device performs a standalone operation. One end of an impedance adjusting circuit is connected to a connection node between the outputs of the first and second amplifier devices, the other end of the impedance adjusting circuit is connected to one end of a second switch circuit, and the other end of the second switch circuit is connected to a ground potential. The impedance adjusting circuit includes a reactance element.

Abstract translation: 在功率放大器中，响应于预定电平的功率模式信号，第一开关电路向执行并行操作的第一和第二放大器装置提供信号。 响应于另一电平的功率模式信号，第一开关电路向第一放大器装置提供信号，并停止向第二放大器装置提供信号，使得第一放大器装置执行独立操作。 阻抗调节电路的一端连接到第一和第二放大器装置的输出端之间的连接节点，阻抗调节电路的另一端连接到第二开关电路的一端，而第二开关电路的另一端 开关电路连接到地电位。 阻抗调整电路包括电抗元件。