Operation limits for RTD-based MOBILE circuits

Authors:
José M. Quintana;María J. Avedillo;Juan Núñez;Héctor Pettenghi Roldán
Affiliations:
Department of Electronics and Electromagnetism, University of Seville, Seville, Spain and Institute of Microelectronics at Seville, Seville;Department of Electronics and Electromagnetism, University of Seville, Seville, Spain and Institute of Microelectronics at Seville, Seville;Department of Electronics and Electromagnetism, University of Seville, Seville, Spain and Institute of Microelectronics at Seville, Seville;Institute of Microelectronics at Seville, CNM, CSIS, Seville, Spain
Venue:
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Year:
2009

Citing 1
Cited 1

Threshold logic circuit design of parallel adders using resonant tunneling devices

IEEE Transactions on Very Large Scale Integration (VLSI) Systems - Special issue on the 11th international symposium on system-level synthesis and design (ISSS'98)

An efficient heuristic to identify threshold logic functions

ACM Journal on Emerging Technologies in Computing Systems (JETC)

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Abstract

Resonant-tunneling-diode (RTD)-based MOnostable-BIstable Logic Element (MOBILE) circuits operate properly in a certain frequency range. They exhibit both a minimum operating frequency and a maximum one. From a design point of view, it should be desirable to have gates with a correct operation from dc up to the maximum operating frequency (i.e., without the minimum bound). This paper undertakes this problem by analyzing how transistors and RTDs interact in RTD-based circuits. Two malfunctions have been identified: the incorrect evaluation of inputs and the lack of self-latching operation. The difficulty to study these problems in an analytical way has been overcome by resorting to series expansions for both the RTD and the heterojunction field-effect transistor I-V characteristics in the points of interest. We have obtained analytical expression linking representative device parameters and technological setup, for a MOBILE-based circuit to operate correctly.