DESIGN AND ANALYSIS OF LCVCOUSINGDIFFERENTCMOSTECHNOLOGY

Abstract

This project reveals the different types of VCO topologies and their comparison on the basis of their voltage, power and frequency in different CMOS technology. These VCO’s topology is designed using ring oscillator. The various topologies which we have design and compared Single Switch LC-VCO, Double Switch LC-VCO and Single Switch with current source LC-VCO. The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a transistor used for amplifying or switching electronic signals. CMOS is a Complementary Metal Oxide Semiconductor which is a combination of PMOS & NMOS. This technology is used because of it very low power dissipation. VCO is a Voltage Control Oscillator, in which the output frequency is controlled by its input controlled voltage. By using both of these in a combination, different VCO topology based on ring oscillator can be implemented A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. For simulation of these VCO Tanner EDA is used, in which EDA is an Electronic Design Automation. The 13 version of Tanner EDA tool is used for simulation. CMOS VCO can be used in various applications. Some are Phase Locked Loop (PLL), frequency generator, testing circuits etc. In this VCO topology, we have used supply voltage of 1.5 V. This project reveals with the design and analysis of different LC-VCO. Here we have used the different types of topologies of the ring oscillator. Here we have used different strategies to enhance the performance of the ring oscillator such as frequency, power dissipation, area and PVT variation.