公开(公告)号：US20180375512A1

公开(公告)日：2018-12-27

申请号：US15731768

申请日：2015-09-17

Applicant: CSMC TECHNOLOGIES FAB2 CO., LTD

Inventor： Yun GAO

IPC: H03K17/22 ,  G06F1/24 ,  G05F3/24 ,  H03K17/687

CPC classification number: H03K17/223 ,  G05F3/24 ,  G06F1/24 ,  H03K17/22 ,  H03K17/687

Abstract: A power on reset circuit, comprising: a threshold level control circuit (120) configured to set threshold level values of power on reset and power off reset; a capacitor charge and discharge circuit (130) configured to output a power on reset signal according to the threshold level values set by the threshold level control circuit; and a current bias circuit (110) configured to provide a reference current not varying with a power supply to the threshold level control circuit (120) and the capacitor charge and discharge circuit (130), comprising: a first reference current output terminal connected to the threshold level control circuit (120); a second reference current output terminal connected to the capacitor charge and discharge circuit (130); and a third reference current output terminal connected to the capacitor charge and discharge circuit (130).