This tutorial on Subtractors accompanies the book Digital Design Using Digilent FPGA Boards - VHDL / Active-HDL Edition which contains over 75 examples that show you how to design digital circuits using VHDL, simulate them using the Aldec Active-HDL simulator, and synthesize the designs to a Xilinx FPGA. Visit www.lbebooks.com for more information or to purchase this inexpensive, informative, award winning book.
