IMPLEMENTATION OF OTA USING DIFFERENT METHODOLOGY

Abstract

Manufacturers and designers are looking for methods to construct Smaller-sized high-performance devices with reduced power consumption, and are lighter in weight in today's competitive market. Low static power consumption, complete rail dynamic range, and simplicity of scaling combine to make the ideal mix for high-performance integrated circuits (IC). In many applications, analog integrated circuits, the Operational Transconductance Amplifier (OTA) is the block with so much power consumption. The importance of low power consumption in phone devices is growing, therefore designing a low-power OTA is a problem. For an OTA design, Between speed, power, and gain, there is a trade-off, because these metrics are frequently contradictory. Two-stage OTAs, cascode OTAs, and folded cascode OTAs are the three types of OTAs that I have implemented in this project work. We discuss different types of OTA that include Single stage OTA, Two-stage OTA, cascode OTA, Folded cascode OTA. Also, The comparative analysis of the design and performance of an operational transconductance amplifier using CMOS and FinFET is presented. Active filters and other devices make use of the operational transconductance amplifier (OTA), which needs low power consumption and high gain, and OTA based on FinFET is proposed for this reason. The application of FinFET in analog circuits is a crucial area of study. A simple analysis of various multigate FETs and their advantages over current technology, as well as the need for us to improve such transistors, is presented. The ability to shrink the physical size of such technologies is the driving force behind their growth. The OTA has been implemented using CMOS and 18 nm FinFET models, with all simulations performed in Cadence Virtuoso. An operational amplifier may not be adequate to be used for an active element in many analog or mixed VLSI applications. For instance, when designing integrated high-frequency active filter circuitry, an OTA, is often used which is a much simpler building block. The term "operational" refers to the fact that the difference of two voltages is used as the input for the current conversion. The size of transistors is decreasing and the power supply is also decreasing as a result of recent advancements in VLSI technology Most analog circuits with linear input-output characteristics use the OTA as a basic building element. The OTA is commonly utilized in analog circuits such as neural networks, instrumentation amplifiers, ADCs, and filter circuits.