Power on and power down reset circuit

A power on and power down reset circuit, applied for receiving an input voltage input from an input-voltage end to further generate a reset voltage, comprising:

• a reference voltage generation module, electrically connected with the input-voltage end, configured for receiving the input voltage to generate correspondingly a reference voltage, including:
• a first PMOS transistor, having a first source, a first drain and a first gate, the first source being to receive the input voltage;
• a second PMOS transistor, having a second source, a second drain and a second gate, the second drain being electrically serially connected with the first gate of the first PMOS transistor, the second source being to receive the input voltage;
• a third PMOS transistor, having a third source, a third drain and a third gate, the third gate being electrically serially connected with the second gate, the third source being to receive the input voltage;
• a first NMOS transistor, having a sixth source, a sixth drain and a sixth gate, the sixth drain being electrically serially connected with the first drain of the first PMOS transistor, the sixth gate being electrically serially connected with the first drain;
• a second NMOS transistor, having a seventh source, a seventh drain and a seventh gate, the seventh drain being electrically serially connected with the second drain;
• a third NMOS transistor, having an eighth source, an eighth drain and an eighth gate, the eighth gate being electrically serially connected with the seventh gate, the eighth drain being electrically serially connected with the third drain;
• a first resistor, electrically serially connected with the sixth source of the first NMOS transistor and the seventh drain of the second NMOS transistor;
• and
• a second resistor, electrically serially connected with the first resistor;
• a monitoring voltage generation module, electrically connected with the input-voltage end, configured for receiving the input voltage to generate correspondingly a monitoring voltage;
• and
• a comparator, having a first voltage-input end and a second voltage-input end, electrically connected with the reference voltage generation module and the monitoring voltage generation module, being to receive the monitoring voltage and the reference voltage for generating accordingly the reset voltage.