Eliciting the Potential Functions of Single-Electron Circuits

Masamichi AKAZAWA  Yoshihito AMEMIYA  

IEICE TRANSACTIONS on Electronics   Vol.E80-C   No.7   pp.849-858
Publication Date: 1997/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on New Concept Device and Novel Architecture LSIs)
single-electron,  SET,  logic,  circuit,  stability diagram,  Boltzmann machine,  

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This paper describes a guiding principle for designing functional single-electron tunneling (SET) circuitsthat is a way to elicit the potential functions of a given SET circuit by using as a guiding tool the SET circuit stability diagram. A stability diagram is a map that depicts the stable regions of a SET circuit based on the circuit's variable coordinates. By scrutinizing the diagram, we can infer all the potential functions that can be obtained from a circuit configuration. As an example, we take up a well-known SET-inverter circuit and uncover its latent functions by studying the circuit configuration, based on its stability diagram. We can produce various functions, e.g., step-inverter, Schmidt-trigger, memory cell, literal, and stochastic-neuron functions. The last function makes good use of the inherent stochastic nature of single-electron tunneling, and can be applied to Boltzmann-machine neural network systems.