Comparative study of different technologies to replace CMOS technology

This paper discuss about Survey done for the digital circuit design using different VLSI technologies. In digital electronic world, delay and power consumption improvement are the most important performance parameters of a circuit. To achieve this goal, we can reduce scaling of the feature size. In complementary metal oxide semiconductor (CMOS) technology, reducing the channel length below about 45nm leads to critical problems and challenges such as decreasing gate control, short channel effect, high power density, high sensitivity to process variation and exponential leakage current increment. For these reasons reducing the transistors size finally will stop at a point, leading to grabbing advantage of new technologies that helps to overcome above problems. Hence, the survey was conducted to replace CMOS technology and a comparison is done to replace the CMOS technology with a suitable technology.