公开(公告)号：US20130215808A1

公开(公告)日：2013-08-22

申请号：US13849834

申请日：2013-03-25

Applicant: RF Micro Devices, Inc.

Inventor： Swaminathan Muthukrishnan ,  Cody Hale ,  Randy Naylor ,  Nicholas Liu

IPC: H02H9/04

CPC classification number: H02H9/045 ,  H01L27/0274 ,  H01L27/0292 ,  H02H9/046

Abstract: Antenna switching circuitry comprises a plurality of communication ports, an antenna port, a plurality of switches, and an ESD protection device. The plurality of switches are adapted to selectively couple one or more of the communication ports to the antenna port in order to transmit or receive a signal. The ESD protection device is coupled between one of the plurality of communication ports and ground, and is adapted to form a substantially low impedance path to ground during an ESD event. Upon the occurrence of an ESD event, a received electrostatic charge passes through one or more of the plurality of switches to the ESD protection device, where it is safely diverted to ground. By using only one ESD protection device, desensitization of the antenna switching circuitry due to the parasitic loading of the ESD protection device is avoided. Further, the area of the antenna switching circuitry is minimized.

Abstract translation: 天线切换电路包括多个通信端口，天线端口，多个开关和ESD保护装置。 多个开关适于选择性地将一个或多个通信端口耦合到天线端口以便发送或接收信号。 ESD保护装置耦合在多个通信端口中的一个和地之间，并且适于在ESD事件期间形成基本上低的接地路径。 在发生ESD事件时，接收的静电电荷通过多个开关中的一个或多个开关到ESD保护装置，在那里它被安全地转移到地面。 通过仅使用一个ESD保护装置，避免了由于ESD保护装置的寄生负载导致的天线开关电路的脱敏。 此外，天线切换电路的面积被最小化。

公开(公告)号：US09627883B2

公开(公告)日：2017-04-18

申请号：US13849834

申请日：2013-03-25

Applicant: RF Micro Devices, Inc.

Inventor： Swaminathan Muthukrishnan ,  Cody Hale ,  Randy Naylor ,  Nicholas Liu

IPC: H02H9/04 ,  H01L27/02

CPC classification number: H02H9/045 ,  H01L27/0274 ,  H01L27/0292 ,  H02H9/046

Abstract: Antenna switching circuitry comprises a plurality of communication ports, an antenna port, a plurality of switches, and an ESD protection device. The plurality of switches are adapted to selectively couple one or more of the communication ports to the antenna port in order to transmit or receive a signal. The ESD protection device is coupled between one of the plurality of communication ports and ground, and is adapted to form a substantially low impedance path to ground during an ESD event. Upon the occurrence of an ESD event, a received electrostatic charge passes through one or more of the plurality of switches to the ESD protection device, where it is safely diverted to ground. By using only one ESD protection device, desensitization of the antenna switching circuitry due to the parasitic loading of the ESD protection device is avoided. Further, the area of the antenna switching circuitry is minimized.