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An experimental 4RTD logic gate

A novel logic circuit using resonant-tunneling diodes (RTD), called a 4RTD logic gate, was proposed recently, and possible 200-GHz AND/OR and NAND/NOR operations were predicted by circuit simulations [Yamada,2005]. This paper presents, for the first time, experimental results of the 4RTD logic gate. In particular, an experimental current-mode AND gate has been successfully demonstrated