Output driver having reduced electromagnetic susceptibility and associated methods

An electronic circuit comprising:

• an output terminal coupled to a load to drive the load;
• a driver circuit;
• a control circuit coupled to a control terminal of the driver circuit for controlling the driver circuit;
• a buffer transistor;
• and
• a biasing circuit;
• wherein the buffer transistor is coupled in series between the driver circuit and the output terminal of the electronic circuit, the buffer transistor having a first terminal coupled to the driver circuit, a second terminal coupled to the output terminal of the electronic circuit, and a third terminal coupled to the biasing circuit;
• and
• wherein the biasing circuit is coupled to a gate terminal of the buffer transistor and configured to provide a constant voltage to the gate terminal to bias the buffer transistor to a conducting state to reduce the susceptibility of the electronic circuit to electromagnetic interference, the biasing circuit comprising a voltage regulator, a Zener diode, and a capacitor, wherein a cathode of the Zener diode is coupled to an output of the voltage regulator, an anode of the Zener diode is coupled to a ground signal, the capacitor is coupled across the Zener diode, wherein the output of the voltage regulator and the cathode of the Zener diode are coupled to the gate terminal and a reference terminal, wherein the biasing circuit has an output resistance sufficiently low to maintain the buffer transistor in the conducting state when electromagnetic interference is present.