Amplifier circuit with low malfunction rate

An amplifier circuit, comprising:

• an input stage, coupled to a first supply voltage, the input stage arranged to receive a first voltage at a first node;
• a first resistor, coupled between an input voltage and the input stage;
• an output stage, coupled to a second supply voltage which is different from the first supply voltage, the output stage arranged to provide an output voltage for driving a load;
• a second resistor, coupled between the input stage and the output stage;
• an intermediate stage, coupled between the input stage and the output stage, the intermediate stage comprising a level shifter;
• and
• a transconductance (gm) circuit, coupled to the input stage rather than the intermediate stage, the gm circuit arranged to compare the first voltage with a common mode voltage, and thereby generates a compensate current to the first node.