Several computer-aided design (CAD) tools suitable for use by the designers of digital signal and data processors based on the quasi-TEM assumption for multiconductor transmission lines are presented. The integral equation method due to C. Wei, et al. (1984) is selected for the evaluation of electrostatic parameters, including capacitance, inductance, conductance, and resistance matrices, and attenuation factors as well as propagation constants and crosstalk. These parameters are thereafter used to simulate the waveforms of coupled stripline/microstrip lines by the system decoupling method, which is derived in a manner simpler than previously described in the literature. The computer codes along with the graphics input routines have been integrated into a CAD system referred to as MagiCAD, and are suitable for direct use in CAD procedures for the design of high-clock-rate digital circuits. Numerical examples, comparisons, and applications are shown.>