Parity Generator Circuit using a Multi-State Resonant Tunnelling Bipolar Transistor.

A four bit party generator circuit using a single resonant tunnelling bipolar transistor (RTBT) exhibiting two negative transconductance regions in the characteristics, is demonstrated. The circuit uses only one transistor as compared to 24 needed in conventional logic. The present circuit also provides significant advantages over previous parity generator circuits using resonant tunnelling diodes.