In some aspects, the techniques described herein relate to an electromagnetic interference (EMI) filter circuit including: an input terminal; an output terminal; an electrical ground terminal; a resistor electrically coupled between the input terminal and the output terminal; a first bipolar transistor including: a collector terminal electrically coupled with the input terminal; an emitter terminal electrically coupled with the electrical ground terminal; and a base terminal that is electrically floating; and a second bipolar transistor including: a collector terminal electrically coupled with the output terminal; an emitter terminal electrically coupled with the electrical ground terminal; and a base terminal that is electrically floating.