公开(公告)号：US07009827B1

公开(公告)日：2006-03-07

申请号：US10270882

申请日：2002-10-15

Applicant: Dongyun Lee ,  Chieh-Yuan Chao ,  Jen-Dong Yuh

Inventor： Dongyun Lee ,  Chieh-Yuan Chao ,  Jen-Dong Yuh

IPC: H02H3/20 ,  H02H9/04

CPC classification number: H04L25/0272

Abstract: In some embodiments, a device detection circuit for detecting whether a device is coupled to a differential link, a transmitter (e.g., a transceiver) including such a circuit, and a system including such a transmitter. Preferably, the device detection circuit includes two branches (each branch including a switch), a current source that causes current to flow through either branch, or to be shared by both branches, depending on the state of each switch, and a voltage swing detector configured to detect the voltage between a node (of one branch) and a node (of the other branch) during a device detection operation. In other embodiments, the invention is a device (e.g., a receiver) including a differential termination that can be coupled to a differential link, and an electrical overstress protection circuit coupled to the termination and configured to protect the device against electrical stress during a hot plug event.

Abstract translation: 在一些实施例中，用于检测设备是否耦合到差分链路的设备检测电路，包括这种电路的发射机（例如，收发机）以及包括这种发射机的系统。 优选地，设备检测电路包括两个分支（每个分支包括开关），根据每个开关的状态使电流流过任一分支或由两个分支共享的电流源和电压摆动检测器 被配置为在设备检测操作期间检测（一个分支）的节点和另一个分支的节点之间的电压。 在其他实施例中，本发明是一种包括可耦合到差分链路的差分终端的装置（例如，接收器），以及耦合到终端的电应力保护电路，并被配置为在热的过程中保护装置免受电应力 插件事件。