公开(公告)号：US20150194802A1

公开(公告)日：2015-07-09

申请号：US14374498

申请日：2012-02-15

Applicant: QUALCOMM INCORPORATED

Inventor： Quanqing Zhu ,  Guangming Yin

IPC: H02H3/22

CPC classification number: H02H3/22 ,  H04L25/0272 ,  H04L25/028

Abstract: An integrated circuit device (200) includes a first and second differential I/O pins (TRXP/TRXN) and a surge protection circuit. The surge protection circuit includes a protection transistor, a positive surge detection circuit, and a negative surge detection circuit. The protection transistor is connected between the first and second I/O pins and has a gate to receive a control signal (CTRL). The protection transistor is turned on to connect the I/O pins together if the positive surge detection circuit detects a positive surge energy on either of the I/O pins and/or if the negative surge detection circuit detects a negative surge energy on either of the I/O pins. The surge protection circuit provides increased protection for Ethernet device against undesirable energy in a manner that does not adversely affect the performance of the device.

Abstract translation: 集成电路装置（200）包括第一和第二差分I / O引脚（TRXP / TRXN）和浪涌保护电路。 浪涌保护电路包括保护晶体管，正浪涌检测电路和负浪涌检测电路。 保护晶体管连接在第一和第二I / O引脚之间，并具有接收控制信号（CTRL）的门。 如果正浪涌检测电路检测到任一个I / O引脚上的正浪涌能量和/或如果负浪涌检测电路检测到任何一个的负浪涌能量，则保护晶体管导通以将I / O引脚连接在一起 I / O引脚。 浪涌保护电路以不会对设备性能产生不利影响的方式为以太网设备提供更高的防护性能，防止不需要的能量。