Design and implementation of Voltage Control Oscillator (VCO) using 180nm technology

Abstract

Voltage Control Oscillator (VCO) is an integral part of many electronic applications like PLL, clock generation in microprocessors & carrier synthesis in cellular telephones etc. Such applications require different topologies which gives robust high performance. Consequently, VCO design in CMOS technology continues to pose interesting challenges. This paper presents the design of Voltage Control Ring Oscillator with the oscillation frequency up to 1 GHz. The circuit is implemented using Cadence tool in 0.18μm CMOS technology (UMC180) with 1.8V supply. The designed VCO is generating a frequency of 1.06GHz over a temperature range from -40°C to 125°C, & the linearity is achieved over a range of frequency from 970MHz to 1.03GHz. © 2011 Springer-Verlag Berlin Heidelberg.