The contents of this book are designed on the basis of the problem- based-learning (PBL) approach and follow the design -> entry (in both schematic and HDL) -> verification as well as implementation . Based on this paradigm, we develop an incremental learn-by-doing method to help the student to build a sound understanding in both the design principles and the implementations of digital systems based on FPGA devices. Features of this book include · Lab projects are exercised with schematic entry first and then Verilog HDL entry. · Both functional and timing verification are performed in each entry method to ensure the resulting design can work properly in FPGA devices. · The incremental learn-by-doing method is applied to gradually introduce new concepts and hardware resources and increase the depth of lab projects. · The paradigm, design -> entry (in both schematic and HDL) -> verification as well as implementation, is employed to familiarize the reader with the right concept and use of the HDL entry method. · Optional lab projects are provided for readers to make realistic tests on FPGA devices. · Extended lab projects to broaden the reader’s background knowledge and capability. This book can be used as the textbook for the following Digital Logic Design Practice , Introduction to FPGA-Based System Design , Introduction to Digital System Practice , and Introduction to Verilog HDL .