Novel multipeak current-voltage characteristics of series-connected negative differential resistance devices

Three-peak current-voltage (I-V) characteristics can be obtained from the combination of two series-connected negative differential resistance (NDR) devices under certain conditions. We discuss these constraint conditions and demonstrate their role in the design of multipeak I-V characteristics based on NDR devices in series. These phenomena will provide some useful concepts in the multipeak circuit design. Especially, these novel multipeak I-V characteristics can be applied to the multiple-valued logic applications with less devices compared to the traditional structure that stacks N identical devices to obtain N peaks in the I-V curve.