Abstract: A power-on reset circuit is provided. During a power-on process of the power-on reset circuit, a threshold voltage of an output signal rstn jumping from a low level to a high level is adjusted by clamp of a voltage at a node c and voltage division between a first resistor and a second resistor, and is controlled to be greater than a threshold voltage of a metal oxide semiconductor device. During a power-off process of the power-on reset circuit, a threshold voltage of the output signal rstn jumping from the high level to the low level is adjusted by increasing a voltage at a node d by means of a third resistor and voltage division between the first resistor and the third resistor, and is controlled to be greater than the threshold voltage of the metal oxide semiconductor device.
Type:
Grant
Filed:
August 29, 2019
Date of Patent:
July 7, 2020
Assignee:
LONTIUM SEMICONDUCTOR CORPORATOIN
Inventors:
Jiaxi Fu, Cheng Tao, Xiangyu Ji, Feng Chen