Power-on reset circuit

A power-on reset circuit, comprising:

• a band-gap reference circuit, a current comparator, and a voltage comparison circuit, the band-gap reference circuit, the current comparator, and the voltage comparison circuit being powered by a voltage source;
• wherein a first output terminal of the band-gap reference circuit is connected to a control terminal of the current comparator, for inputting a first signal to the control terminal of the current comparator to control operation of the current comparator;
• a first current input terminal of the current comparator receives a first current signal, a second current input terminal of the current comparator receives a second current signal, and an output terminal of the current comparator is connected to a control terminal of the voltage comparison circuit for inputting a second signal to the control terminal of the voltage comparison circuit to control operation of the voltage comparison circuit;
• and
• a first input terminal of the voltage comparison circuit is connected to the first output terminal of the band-gap reference circuit, a second input terminal of the voltage comparison circuit receives a signal indicating a voltage value of the voltage source, and an output terminal of the voltage comparison circuit is used to output a power-on reset signal.