Design of Comparators using CMOS Tanner EDA Tools

Abstract

The real world signals are mostly analog in nature and hence, an analog to digital converter is needed to transmit effectively the analog signals to digital signals. This paper describes the comparator circuits used in most of the analog circuits now-adays. Comparators play a vital role in most of the analog circuits like Flash ADC’s and the performance of these circuits is greatly influenced by the choice of comparators. In this paper, first a “ Open loop comparator” is designed and its analysis is done followed by a “TIQ comparator”, “Quantized Differential Comparator”, “Two stage CMOS amplifier with an output inverter” and “CMOS-LTE Comparator” and all of these circuits are used for implementing a lot low power analog circuits. After implementing all the comparator circuits, power and delay analysis has been done on the basis of which Power-Delay-Product (PDP) has been calculated. All the above circuits are implemented using 180nm CMOS technology using a supply voltage of 1.8v. TANNER EDA environment is used for design and simulation of these circuits.