Class d transconductance amplifier

An amplifier circuit comprising:

• a Schmidt trigger having an input electrically coupled to an input of the amplifier circuit;
• a switching network electrically coupled to an output of the Schmidt trigger;
• an inductor electrically coupled to the switching network, wherein based on a state of the switching network, the switching network provides a positive supply voltage or a negative supply voltage to the inductor, and wherein the inductor provides a circuit path for current to flow to an output of the amplifier circuit;
• a first resistor electrically coupled to the inductor;
• a capacitor electrically coupled to the first resistor;
• a first feedback circuit that provides a first feedback signal to the input of the Schmidt trigger based on a voltage at a first node electrically coupled to the first resistor and to the capacitor;
• a second resistor electrically coupled to the output of the amplifier circuit;
• a third resistor electrically coupled to the second resistor;
• and
• a second feedback circuit that provides a second feedback signal to the input of the Schmidt trigger based on a voltage at a second node electrically coupled to the second resistor and to the third resistor,
• wherein the current at the output of the amplifier circuit is proportional to an input voltage applied to the input of the amplifier circuit.