Modeling and Simulation of In-plane Four-Electrode Contactless Conductivity Detector of Electrophoresis Microchip in VHDL-AMS

A modeling and simulation methodology for in-plane four-electrode capacitively coupled contactless conductivity detector of capillary electrophoresis microchip (IFC4D) is presented with the VHDL-AMS modeling language. The VHDL-AMS-based basic compact models of IFC4D are developed, such as the equivalent resistance models of solution, the plane coupling capacitance models. The time-domain and frequency-domain curves of IFC4D equivalent circuits are studied by analyzing the related parameters, such as the conductivity of solution, the materials and thickness of insulating film, the interval and width of electrodes, and so on. The validity of IFC4D model is verified by comparing the simulation results with the experiment datum in references.