Integrated circuit

An integrated circuit, comprising:

• a signal connection pad;
• an electrostatic discharge protection circuit, coupled to the signal connection pad;
• an input stage circuit, wherein a first input terminal of the input stage circuit is coupled to the electrostatic discharge protection circuit, and the input stage circuit comprises:
• a load circuit;
• a current source circuit;
• a first input transistor, wherein a control terminal of the first input transistor is coupled to the electrostatic discharge protection circuit, a first terminal of the first input transistor is coupled to the load circuit, and a second terminal of the first input transistor is coupled to the current source circuit;
• and
• an impedance circuit, wherein a first terminal of the impedance circuit is coupled to a body of the first input transistor, and a second terminal of the impedance circuit is coupled to a first voltage;
• and
• an electrostatic discharge enhanced-protection circuit coupled to the electrostatic discharge protection circuit and the input stage circuit, wherein the electrostatic discharge enhanced-protection circuit comprises:
• an electrostatic discharge protection transistor, wherein a first terminal of the electrostatic discharge protection transistor is coupled to the electrostatic discharge protection circuit and the control terminal of the first input transistor, a second terminal and a control terminal of the electrostatic discharge protection transistor are coupled to a power rail of the integrated circuit, and the power rail is coupled to a power connection pad of the integrated circuit.