公开(公告)号：US20050253626A1

公开(公告)日：2005-11-17

申请号：US11005890

申请日：2004-12-06

Applicant: Yan Chong ,  Chiakang Sung ,  Bonnie Wang ,  Khai Nguyen ,  Joseph Huang ,  Xiaobao Wang ,  Philip Pan ,  In What Kim ,  Gopi Rangan ,  Tzung-Chin Chang ,  Surgey Shumarayev ,  Thomas White

Inventor： Yan Chong ,  Chiakang Sung ,  Bonnie Wang ,  Khai Nguyen ,  Joseph Huang ,  Xiaobao Wang ,  Philip Pan ,  In What Kim ,  Gopi Rangan ,  Tzung-Chin Chang ,  Surgey Shumarayev ,  Thomas White

IPC: G01R19/155 ,  G06F1/24 ,  G06F1/28 ,  G06F1/32 ,  H03K3/356 ,  H03K17/22 ,  H03K19/0175

CPC classification number: H03K3/356008 ,  G01R19/155 ,  G06F1/24 ,  G06F1/28 ,  G06F1/3203 ,  H03K17/223

Abstract: A supply voltage detection circuit determines when the voltage for any one of the power supply signals received by an integrated circuit device is below its steady state level, as may occur during a hot socket condition when the device is inserted in or removed from a powered-on system. A first detection circuit determines when the first supply voltage level is below its steady state level, and a second detection circuit determines when the second supply voltage level is below its steady state level. A logic circuit provides a detected condition signal that disables current flow through an input/output terminal associated with the supply voltage detection circuit. The circuit is able to rapidly detect hot socket conditions for a wide range of power supply signal levels, including low supply signal levels, while limiting leakage current effects.