@article{mundt_nagle_2000, title={Applications of SPICE for modeling miniaturized biomedical sensor systems}, volume={47}, ISSN={0018-9294}, url={http://dx.doi.org/10.1109/10.821733}, DOI={10.1109/10.821733}, abstractNote={This paper proposes a model for a miniaturized signal conditioning system for biopotential and ion-selective electrode arrays. The system consists of three main components: sensors, interconnections, and signal conditioning chip. The model for this system is based on SPICE. Transmission-line based equivalent circuits are used to represent the sensors, lumped resistance-capacitance circuits describe the interconnections, and a model for the signal conditioning chip is extracted from its layout. In conclusion, a system for measurements of biopotentials and ionic activities can be miniaturized and optimized for cardiovascular applications based on the development of an integrated SPICE system model of its electrochemical, interconnection, and electronic components.}, number={2}, journal={IEEE Transactions on Biomedical Engineering}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Mundt, C.W. and Nagle, H.T.}, year={2000}, pages={149–154} } @article{buck_mundt_1999, title={Origins of finite transmission lines for exact representations of transport by the Nernst-Planck equations for each charge carrier}, volume={44}, ISSN={["0013-4686"]}, DOI={10.1016/S0013-4686(98)00309-0}, abstractNote={The Barker/Brumleve/Buck (BBB) circuits and sub-circuit units, are derived and illustrated for the generation of the conventional two-feature mass transport-controlled impedance. This finite 2-port, 4-terminal network for a single salt system, replaces the classical 1-port, 2-terminal cable transmission line analog because the latter describes only the lower-frequency Warburg feature. Symmetric or asymmetric cell results depend only on the ion or electron terminals used. Three feature impedance plane plots for slow, potential-dependent ion and/or electron transfers with activation resistance and relaxed double layer capacitance, are generated and illustrated. Residual solution resistance and total cell geometric capacitance are included to generate the expected four-feature impedance plots for cells without special features such as ion pairing and adsorption–reaction processes. This paper presents new results for a circuit description of electron hopping in redox polymers with concomitant counter ion motion. The forms of single species flux equation: Barker, Nernst–Planck, and electron-hopping are compared. The latter two are converted into responses I or j vs φ functions that define “T” circuit elements. Two forms arise that define the implicit Ri or Re, and Ci or Ce per unit length (i=ion, e=electron), and the corresponding explicit R and C. The analysis uses as examples (1) a single dissolved, inert electrolyte salt M+ X−, and (2) a redox polymer electrolyte radical cation and anion, also M+, X−, undergoing second order electron hopping from M to M+. The corresponding forms for the Rs and Cs are derived. A second case is illustrated to show how the d.c. bias changes the polymer cation/anion compositions (assuming Nernstian behavior), and so determines different Re and Ce at each composition through the effective second order, concentration-dependent electron hopping.}, number={12}, journal={ELECTROCHIMICA ACTA}, author={Buck, RP and Mundt, C}, year={1999}, pages={1999–2018} } @article{mundy_creamer_crozier_wilson_1999, title={Potato production on wide beds: Impact on held and selected soil physical characteristics}, volume={76}, ISSN={["1874-9380"]}, DOI={10.1007/BF02910004}, number={6}, journal={AMERICAN JOURNAL OF POTATO RESEARCH}, author={Mundy, C and Creamer, NG and Crozier, CR and Wilson, LG}, year={1999}, pages={323–330} } @article{buck_mundt_1997, title={General aperiodic equivalent circuit for charge permeable thin-layer cells of symmetric or asymmetric types .3. Mixed conductance, polymer electrolyte asymmetric cells}, volume={93}, ISSN={["0956-5000"]}, DOI={10.1039/a701867c}, abstractNote={This paper presents forms of single species flux equation: Barker, Nernst–Planck, and electron hopping. The latter two are converted into responses I or jvs. φ functions that define T circuit elements. Two forms arise that define the implicit Ri or Re, and Ci or Ce per unit length (i=ion, e=electron), and the corresponding explicit R and C. The analysis uses as examples (1) a single dissolved, inert electrolyte salt M+ X-, and (2) a redox polymer electrolyte radical cation and anion, also M+, X-, undergoing second-order electron hopping from M to M+. The corresponding forms for the Rs and Cs are derived. Case 2 is the mixed conductance asymmetric cell which is illustrated to show how the dc bias changes the polymer cation, anion composition, and so determines different Re and Ce at each composition through the effective second-order, concentration-dependent electron hopping.In Part 1, Barker–Brumleve–Buck (BBB) sub-circuit units, were illustrated, viz., the conventional two-feature mass transport-controlled impedance was generated. This finite two-port, four-terminal network for a single salt system, replaced the classical one-port, two-terminal cable transmission line analog because the latter covers only the Warburg feature. Results were specifically used to compare BBB impedances with shorted and open finite cables to show conditions of equivalence. Both symmetric and asymmetric cell results depend only on the ion or electron terminals used. In Part 2, the usual three-feature impedance plane plots for each ion requiring activation to cross the interface are generated and illustrated. In addition, residual cell solution resistance and total cell geometric capacitance were included to generate the four-feature impedance plots.}, number={19}, journal={JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS}, author={Buck, RP and Mundt, C}, year={1997}, month={Oct}, pages={3511–3517} }