Source follower circuit with feedback loop and self-biased diode-connected metal-oxide-semiconductor load

A source follower circuit comprising:

• a first metal-oxide-semiconductor (MOS) transistor, wherein a gate terminal of the first MOS transistor is arranged to receive an input signal of the source follower circuit, and a source terminal of the first MOS transistor is arranged to output an output signal of the source follower circuit;
• a second MOS transistor, wherein a gate terminal of the second MOS transistor is coupled to a bias voltage, a source terminal of the second MOS transistor is coupled to a first reference voltage, and a drain terminal of the second MOS transistor is coupled to the source terminal of the first MOS transistor;
• a third MOS transistor, wherein the third MOS transistor is a self-biased diode-connected MOS transistor, a gate terminal of the third MOS transistor is coupled to a drain terminal of the third MOS transistor, the drain terminal of the third MOS transistor is coupled to a drain terminal of the first MOS transistor, and a source terminal of the third MOS transistor is coupled to a second reference voltage;
• a feedback loop circuit, coupled between the drain terminal of the first MOS transistor and the gate terminal of the second MOS transistor;
• and
• a resistor, coupled between the drain terminal and the gate terminal of the third MOS transistor.