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Threshold gate

A MOBILE circuit and a threshold logic gate based on a Si/SiGe ITD and MODFET were simulated in HSPICE. The results demonstrated correct operation for both the MOBILE and the TLG. For the device chosen the resulting circuit required positive and negative going input signals to modulate the current in the MODFET sufficiently to produce MOBILE operation. The simulations also showed that it would be necessary to include level shifting circuitry if this signal system was chosen.

P.M. Kelly, C.J. Thompson, T.M. McGinnity, and L.P. Maguire, Investigation of a Programmable Threshold Logic Gate Array IEEE International Conference Electronics Circuits and Systems, proceedings Vol. II, pp 673-67, Sept 2002.

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