Flip-flop circuit using a resonant-tunnelling hot electron transistor (RHET)

This letter proposes a circuit using a resonant-tunnelling hot electron transistor (RHET). The circuit uses a resistor in series with the base of the RHET to make bistable states. Preliminary test results are reported which show that this circuit acts as a bistable multivibrator or flip-flop, indicating that the RHET has both switching and memory functions, while conventional transistors have only the switching function. This attractive feature should be useful for memory and/or logic applications, since the flip-flop is a fundamental function used in these circuits.