Power on reset (POR) circuit

摘要

Disclosed herein is a power on reset (POR) circuit, including: a current mirror circuit adjusting ratio of current flowing in a circuit according to voltage supplied from power; an inverter driven according to output of the current mirror circuit to output a POR signal; a brown out detection (BOD) comparator electrically connected to the current mirror circuit and comparing the voltage supplied from the power with reference voltage to output a corresponding voltage signal according to the comparison result; a BOD controlling switch driven when the output of the BOD comparator is zero voltage (0V) to again operate a POR; and a current controlling switch installed in the current mirror circuit and driven when the output of the BOD comparator is zero voltage (0V) to control and supply current of the POR.

主权项

1. A power on reset (POR) circuit, comprising:
a current mirror circuit adjusting ratio of current flowing in a circuit according to voltage supplied from power; an inverter electrically connected to the current mirror circuit and driven according to output of the current mirror circuit to output a POR signal; a brown out detection (BOD) comparator electrically connected to the current mirror circuit and comparing the voltage supplied from the power with reference voltage to output a corresponding voltage signal according to the comparison result; a BOD controlling switch electrically connected to an output terminal of the BOD comparator and driven when the output of the BOD comparator is zero voltage (0V) to again operate a POR; and a current controlling switch installed in the current mirror circuit and driven when the output of the BOD comparator is zero voltage (0V) to control and supply current of the POR.