Pass-XNOR logic: A new logic style for P-N junction based graphene circuits

In this work we introduce a new logic style for p-n junctions based digital graphene circuits: the pass-XNOR logic style. The latter enables the realization of compact, energy efficient circuits that better exploit the characteristics of graphene. We first show how a single p-n junction can be conceived as a pass-XNOR gate, i.e., a transmission gate with embedded logic functionality, the XNOR Boolean operator. Secondly, we propose a smart integration strategy in which series/parallel connections of pass-XNOR gates allow to implement AND/OR logical conjunctions, and, therefore, all possible truth tables. Experimental results conducted on a set of representative logic functions show the superior of pass-XNOR logic circuits w.r.t. standard CMOS circuits and graphene circuits that use p-n junctions in a complementary-like structure.

[1]  F. Guinea,et al.  The electronic properties of graphene , 2007, Reviews of Modern Physics.

[2]  Jochen Mannhart,et al.  Electrostatic modification of novel materials , 2006 .

[3]  Azad Naeemi,et al.  Device- and system-level performance modeling for graphene P-N junction logic , 2012, Thirteenth International Symposium on Quality Electronic Design (ISQED).

[4]  Enrico Macii,et al.  Delay model for reconfigurable logic gates based on graphene PN-junctions , 2013, ACM Great Lakes Symposium on VLSI.

[5]  Wei Wang,et al.  Reconfigurable multi-function logic based on graphene p-n junctions , 2010, Design Automation Conference.

[6]  Enrico Macii,et al.  A Verilog-A model for reconfigurable logic gates based on graphene pn-junctions , 2013, 2013 Design, Automation & Test in Europe Conference & Exhibition (DATE).

[7]  Kinam Kim,et al.  Graphene Barristor, a Triode Device with a Gate-Controlled Schottky Barrier , 2012, Science.

[8]  Aachen,et al.  A Graphene Field-Effect Device , 2007, IEEE Electron Device Letters.

[9]  C. Dimitrakopoulos,et al.  100 GHz Transistors from Wafer Scale Epitaxial Graphene , 2010, 1002.3845.

[10]  Andre K. Geim,et al.  Two-dimensional atomic crystals. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[11]  Enrico Macii,et al.  Power modeling and characterization of Graphene-based logic gates , 2013, 2013 23rd International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS).

[12]  L. Register,et al.  Effect of edge roughness on electronic transport in graphene nanoribbon channel metal-oxide-semiconductor field-effect transistors , 2007, 0712.3068.

[13]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[14]  Vladimir I. Fal'ko,et al.  Selective transmission of Dirac electrons and ballistic magnetoresistance of n − p junctions in graphene , 2006 .