TWO-TERMINAL NEGATIVE RESISTANCE DEVICE EMPLOYING BIPOLAR-UNIPOLAR TRANSISTOR COMBINATION

摘要

This Specification describes electrical networks having two terminals and exhibiting negative dynamic resistance characteristics achieved by the use of a field effect transistor having its gate electrode connected to one of the terminals and connected in a resistive bias circuit to control the base current of a bipolar transistor having its collector-emitter path connected in a circuit from one to the other of the terminals. Both voltage controlled and current controlled networks are described and examples of the use of negative feedback arrangements to improve network linearity are given.