Abstract. An Electro-Optical Hybrid Logic Gate is defined as a circuit that accepts either electrical or optical signals and produces both electrical and optical signals. This paper explores the feasibility of developing hybrid gates for logic functions namely OR and AND, which can perform the intended logic function either with electrical or optical input signals and produce the output both in the form of electrical and optical signals. These hybrid logic gates are proposed and implemented using phototransistors and LEDs. The logic circuits are found to be operating satisfactorily for the defined logic levels.

Keywords: hybrid circuits, hybrid logic gates, hybrid opto-electronics, optical computing, opto-electronics, optical logic gates, optical bistability.

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