Performance-Oriented CMOS Multiplexer Layout Optimization Process

Abstract

Multiplexer circuits are fundamental building blocks in modern digital systems and play a vital role across 
various domains of engineering, particularly in digital design and communication systems. In the field of Very 
Large-Scale Integration (VLSI), there is a continuous drive to reduce design complexity, development time, and 
overall resource utilization while maintaining high performance. This project focuses on the design and 
implementation of a 2-to-1 multiplexer using CMOS (Complementary Metal-Oxide-Semiconductor) logic, with 
the objective of developing a more efficient, compact, and optimized circuit architecture. The study explores 
multiple design approaches to achieve significant improvements in key performance parameters, including power 
consumption, circuit complexity, propagation delay, and silicon area. A detailed comparative analysis is carried 
out using 35 nm technology, which allows for a realistic evaluation of how nanoscale fabrication processes 
influence the behavior and efficiency of the multiplexer design. 
Special emphasis is placed on area optimization, as reducing the physical footprint of digital circuits is critical 
for improving integration density and lowering manufacturing costs in VLSI systems. By critically examining and 
refining different logic design methodologies, this work aims to contribute a streamlined and practical solution 
for multiplexer implementation that balances performance with resource efficiency. The proposed design not only 
demonstrates improved characteristics compared to conventional approaches but also highlights the importance 
of careful architectural choices in nanoscale CMOS technology for next-generation digital systems.