title: Design of High Quality Chemical XOR Gates with Noise Reduction.
abstract: We describe a chemical XOR gate design that realizes gate-response function with filtering properties. Such gate-response function is flat (has small gradients) at and in the vicinity of all the four binary-input logic points, resulting in analog noise suppression. The gate functioning involves cross-reaction of the inputs represented by pairs of chemicals to produce a practically zero output when both are present and nearly equal. This cross-reaction processing step is also designed to result in filtering at low output intensities by canceling out the inputs if one of the latter has low intensity compared with the other. The remaining inputs, which were not reacted away, are processed to produce the output XOR signal by chemical steps that result in filtering at large output signal intensities. We analyze the tradeoff resulting from filtering, which involves loss of signal intensity. We also discuss practical aspects of realizations of such XOR gates.
authors.affiliation: Department of Physics, Clarkson University, Potsdam, NY, 13676, USA.
authors.forename: Mackenna L
authors.initials: ML
authors.lastname: Wood
authors.affiliation: Department of Physics, Clarkson University, Potsdam, NY, 13676, USA.
authors.forename: Sergii
authors.identifier: http://orcid.org/0000-0002-6847-6019
authors.initials: S
authors.lastname: Domanskyi
authors.affiliation: Department of Physics, Clarkson University, Potsdam, NY, 13676, USA.
authors.forename: Vladimir
authors.identifier: http://orcid.org/0000-0001-5315-2604
authors.initials: V
authors.lastname: Privman
keywords: XOR; binary gates; chemical computing; digital; noise reduction