A vertical resonant tunneling transistor for application in digital logic circuits

A vertical resonant tunneling transistor (VRTT) has been developed, its pro perties and its application in digital logic circuits based on the monostab le-bistable transition logic element (MOBILE) principle are described. The device consists of a small mesa resonant tunneling diode (RTD) in the GaAs/ AlAs material system surrounded by a Schottky gate. We obtain low peak volt ages using InGaAs in the quantum well and the devices show an excellent pea k current control by means of an applied gate voltage. A self latching inve rter circuit has been fabricated using two VRTTs and the switching function ality was demonstrated at low frequencies.