公开(公告)号：US20240243736A1

公开(公告)日：2024-07-18

申请号：US18395917

申请日：2023-12-26

Applicant: MEDIATEK INC.

Inventor： Jhen-Kai WANG ,  Wei-Hsin TSENG

IPC: H03K5/01 ,  H03K17/687

CPC classification number: H03K5/01 ,  H03K17/6871

Abstract: A digital step attenuator (DSA) with efficient high-frequency signal attenuation is shown. The DSA has an attenuation circuit, a bypass switch, and a diversion circuit.
The attenuation circuit is coupled between an input node and an output node of the digital step attenuator. The bypass switch is controlled by a bypass control signal to provide a bypass path between the input node and the output node of the digital step attenuator. The diversion circuit couples a control terminal of the bypass switch to a ground terminal in response to the bypass control signal being in an inactive state.

公开(公告)号：US20240243732A1

公开(公告)日：2024-07-18

申请号：US18395930

申请日：2023-12-26

Applicant: MEDIATEK INC.

Inventor： Wei-Hsin TSENG ,  Jhen-Kai WANG

IPC: H03H17/00 ,  H03H7/25 ,  H03H11/24

CPC classification number: H03H17/0054 ,  H03H7/25 ,  H03H11/24

Abstract: A multi-level digital step attenuator (DSA) with a hybrid attenuation circuit is shown. The hybrid attenuation circuit is coupled between an input node and an output node of the multi-level DSA. The bypass switch of the multi-level DSA is controlled to provide a bypass path between the input node and the output node of the of the multi-level DSA when the hybrid attenuation circuit is in a disabled state. In the first active state, the hybrid attenuation circuit is switched to form a T-type structure to provide a first amount of signal attenuation. In the second active state, the hybrid attenuation circuit is switched to form a Pi-type structure to provide a second amount of signal attenuation.