Textbooks

1. "Principles of CMOS VLSI Design" by Weste-Eshraghian
2. "System Integration: From Transistor Design to Large Scale Integration" by Kurt Hoffman
3. "Electronics (Fundamentals and Applications)" by D Chattopadhyay
4. The Spice Book, Andrei Vladimirescu, John Wiley & Sons, Inc.
5. CMOS: Circuit Design, Layout, and Simulation, Third Edition by R. Jacob Baker, Wiley-IEEE.
6. A Guide to Circuit Simulation and Analysis Using PSpice, Paul Tuinenga, 3rd Edition, Prentice-Hall.
7. The VLSI Handbook, Second Edition (Electrical Engineering Handbook) by Boca Raton: CRC. ISBN 0-8493-4199-X.

SPICE User Manuals & Tutorials

8. SPICE User Manual - University of California, Berkeley
9. LTspice Official Documentation
10. PSpice User Guide
11. SPICE Tutorial - ECE Texas

Applications and Annotated Readings

12. XOR and XNOR Gates in Adders - Electronics Tutorials
    • Explains how XOR gates are used in half and full adder circuits for binary addition.
13. Parity Checkers and XNOR Gates - All About Circuits
    • Shows how XNOR gates are used in parity checking and error detection.
14. Digital Logic Applications - GeeksforGeeks

Open-Source Simulation Tools

15. Ngspice - Open Source SPICE Simulator
16. Qucs - Quite Universal Circuit Simulator
17. KiCad EDA - Integrated Open Source Suite

Additional Web Resources

18. All About Circuits - SPICE Resources
19. CMOS XOR & XNOR Gate Theory - Electronics Tutorials