公开(公告)号：US12040757B2

公开(公告)日：2024-07-16

申请号：US17378802

申请日：2021-07-19

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Ching-Wen Hsu ,  Hsien-Wei Ke

IPC: H03F3/21 ,  H03F3/72 ,  H03F1/56

CPC classification number: H03F3/211 ,  H03F3/72 ,  H03F1/565 ,  H03F2200/111 ,  H03F2200/222 ,  H03F2200/372 ,  H03F2200/387 ,  H03F2203/7209

Abstract: An amplifier circuit includes a first amplifier and a second amplifier. The first amplifier receives a first signal and generates a first amplification signal accordingly. The second amplifier receives a second signal and generates a second amplification signal accordingly. The first signal is related to a first frequency band, and the second signal is related to a second frequency band different from the first frequency band. When one of the first amplifier and the second amplifier is in use, the other one of the first amplifier and the second amplifier is unused. The first amplifier and second amplifier are coupled to a reference voltage terminal through a common node. The first amplifier includes a switch coupled between the common node and a stage of the first amplifier, and the switch can be controlled for reducing the loading effect caused by the first amplifier on the second amplifier.

公开(公告)号：US20210351749A1

公开(公告)日：2021-11-11

申请号：US17378802

申请日：2021-07-19

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Ching-Wen Hsu ,  Hsien-Wei Ke

IPC: H03F3/21 ,  H03F3/72

Abstract: An amplifier circuit includes a first amplifier and a second amplifier. The first amplifier receives a first signal and generates a first amplification signal accordingly. The second amplifier receives a second signal and generates a second amplification signal accordingly. The first signal is related to a first frequency band, and the second signal is related to a second frequency band different from the first frequency band. When one of the first amplifier and the second amplifier is in use, the other one of the first amplifier and the second amplifier is unused. The first amplifier and second amplifier are coupled to a reference voltage terminal through a common node. The first amplifier includes a switch coupled between the common node and a stage of the first amplifier, and the switch can be controlled for reducing the loading effect caused by the first amplifier on the second amplifier.