THRESHOLD LOGIC FUNCTION ON BOTH POSITIVE AND NEGATIVE WEIGHTED SUMS IN MULTIPLE-INPUT MONOSTABLE-BISTABLE TRANSITION LOGIC ELEMENTS

This paper describes the functional operation of a monostable-bistable transition logic element (MOBILE) with multiple-input logic gates. The MOBILE uses two resonant-tunneling transistors (RTTs) connected in series and driven by oscillating bias voltage to produce a mono-to-bistable transition of the circuit. It is experimentally shown that a fabricated 3-input MOBILE can perform threshold logic functions on the weighted sum of input signals. It can also easily handle both positive and negative weights when input signals are applied to both RTTs.