PSpice A/D is a simulation package that is used to analyze and predict the performance of analog and mixed signal circuits. It is very popular especially among Printed Circuit Board (PCB) engineers to verify board level designs. However, PSpice A/D currently lacks the ability to simulate analog components connected to digital circuits that are modeled using Hardware Descriptive Languages (HDLs), such as VHDL and Verilog HDL. Simulation of HDL models in PSpice A/D is necessary to verify mixed signal PCBs where programmable logic devices like Field Programmable Gate Arrays (FPGAs) and Complex Programmable Logic Devices (CPLDs) are connected to discrete analog components. More than 60% of the PCBs that are designed today contain at least one FPGA or CPLD. This thesis investigates the possibility of simulating VHDL models in PSpice A/D. A new design methodology and the necessary tools to achieve this goal are presented. The new design methodology achieves total system verification at PCB level. Total system verification reduces design failures and hence increases reliability. It also allows reducing the overall time to market. A mixed signal design from NASA Goddard Space Flight Center for a brushless three phase motor that runs a space application is implemented by following the proposed design methodology.

Library of Congress Subject Headings

PSpice; Electric circuits--Computer simulation; VHDL (Computer hardware description language); Analog-to-digital converters

Publication Date


Document Type


Department, Program, or Center

Computer Engineering (KGCOE)


Lukowiak, Marcin

Advisor/Committee Member

Reddy, Pratapa

Advisor/Committee Member

Hu, Fei


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TK454 .R34 2005


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