Design of a Low Volage Low Power and High Speed CMOS Comparator

Abstract

Analog-to-digital converters (ADCs) and Digital-to-Analog converters (DACs) are key newlinecomponents of modern microelectronics applications where an interface between the analog newlineworld and the progressive digital signal processing world is needed. They are found in an newlineextensive range of devices in consumer electronics, medical equipment, communication and newlineinstrumentation applications, and current growing areas (e.g. Internet of Things (IoT), all newlineportable systems in today s life, and wearable devices etc.) just to name a few. With the fast newlinedevelopment of CMOS technology, more and more signal processing circuits and building newlineblocks are implemented in the digital domain for lower cost, lower power consumption, newlinehigh-speed, higher yield, and higher re-configurability. To minimize production steps and newlinethe cost of the final product, several functional circuit blocks are combined into one chip and newlineform a System on a Chip (SoC). It is common to implement digital and analog blocks into newlineone chip with additional ADCs or DACs. newlineThe basic building blocks of an ADCs and DACs consist of analog circuits such as voltage newlinereference, operational amplifiers as well as mixed signal circuits such as comparators. The newlinecomparator is also known as 1-bit ADC and for that reason, it is mostly used in abundance newlinein ADCs. Besides ADCs and DACs, the comparator has many other applications such as newlineVLSI logic circuits, memory, relaxation oscillators, null detector, zero-crossing detectors, newlinepeak detectors, switching power regulators, high-speed wireless and wireline newlinecommunication systems, and many more. This has generated a great demand for high-speed, newlinelow-power, and low-voltage comparator that can be realized in a mainstream deepsubmicron newlineComplementary Metal Oxide Semiconductor (CMOS) technology. The newlinerequirement of bandwidth is also increasing day by day and almost all lower bands are newlinealready occupied. The design of ADCs and ultimately the comparator, which work on higher newlinefrequencies are needed in the modern world. The conversion speed of converter is rest