公开(公告)号：EP1492234A3

公开(公告)日：2006-03-15

申请号：EP04014644.1

申请日：2004-06-22

Applicant: STMicroelectronics Pvt. Ltd

Inventor： Roy, Amit

IPC: H03K17/22

CPC classification number: H03K17/223 ,  H03K2217/0036

Abstract: The present invention provides an improved Power-On-reset (POR) circuit providing enhanced reliability and automatic power-down capability, comprising a supply voltage sensing circuit (IS1,P1,VCCS), a delay element (1) connected to the output of the supply voltage sensing circuit, and a switch (P2,N2) that activates the output POR signal when the output of the delay element indicates a reduced supply voltage and deactivates the POR output and provides feedback to reduce current through the supply voltage sensing circuit once the supply voltage is normal.

公开(公告)号：EP1492234A2

公开(公告)日：2004-12-29

申请号：EP04014644.1

申请日：2004-06-22

Applicant: STMicroelectronics Pvt. Ltd

Inventor： Roy, Amit

IPC: H03K17/22

CPC classification number: H03K17/223 ,  H03K2217/0036

Abstract: The present invention provides an improved Power-On-reset (POR) circuit providing enhanced reliability and automatic power-down capability, comprising a supply voltage sensing circuit (IS1,P1,VCCS), a delay element (1) connected to the output of the supply voltage sensing circuit, and a switch (P2,N2) that activates the output POR signal when the output of the delay element indicates a reduced supply voltage and deactivates the POR output and provides feedback to reduce current through the supply voltage sensing circuit once the supply voltage is normal.

Abstract translation: 电路具有电源电压检测电路和连接到感测电路的输出的电容器（C1）。 当电容器的输出指示电压降低时，开关激活输出上电复位（POR）信号。 当电源电压正常时，开关关闭POR输出并提供反馈以减少通过感测电路的电流。