Voltage state detector

A voltage state detector comprising:

• an input terminal;
• a voltage drop circuit comprising a first terminal coupled to the input terminal, and a second terminal;
• a pull-down circuit comprising a first terminal coupled to the second terminal of the voltage drop circuit, and a second terminal coupled to a first reference terminal;
• a first load circuit comprising a first terminal coupled to a second reference terminal, and a second terminal;
• a first transistor comprising a first terminal coupled to the second terminal of the first load circuit, a second terminal coupled to the first reference terminal, and a control terminal;
• a pull-up circuit comprising a first terminal coupled to the second reference terminal, and a second terminal coupled to the first terminal of the voltage drop circuit;
• a first output terminal coupled to the first terminal of the first transistor, and configured to output a first state determination signal;
• a second output terminal configured to output a second state determination signal, wherein the control terminal of the first transistor is coupled to the first terminal of the voltage drop circuit and the second output terminal is coupled to the second terminal of the voltage drop circuit;
• and
• a logic circuit coupled to the first output terminal and the second output terminal, and configured to generate a control signal according to the first state determination signal and the second state determination signal, the logic circuit comprising a NOR gate comprising a first input terminal coupled to the first output terminal, a second input terminal coupled to the second output terminal, and an output terminal configured to output the control signal;
• wherein the control signal is related to the voltage state of the input terminal;
• and
• wherein the first state determination signal and the second state determination signal are used to determine a voltage state of the input terminal.