Comparative analysis of comparators in 90nm CMOS Technology

Abstract

Analog to digital converter (ADC) is a very useful device for extracting the digital signal from the analog one. Technically successive approximation type ADC processing speed depends largely on the fast operation of the comparator, which is one of the vital part of such structure. In today’s digital ultra-tech world, speed and low power consumption are major factors that are taken under consideration. In this paper, the propagation delays, power dissipation of different comparators will be analyzed dependent on different temperature points. The readers can easily draw an analytical expression for the performance of the comparator by considering these comparisons. To design a low power and low voltage comparator voltage supply, propagation delay, power dissipation must be considered which are represented in this paper to find a better comparator which will act ideally in real environment without changing its characteristics. This paper represents a comparison of different comparators such as circuit complexity, length, CMOS technology, voltage supply etc. Simulations have been performed by using SPICE in 90 nm CMOS technology.