Performance Analysis of Single-Ended Voltage Control VCOs and Design of Low Power High Performance Ring VCO for Wireless Applications

Abstract

For various wireless communication systems, the voltage-controlled oscillator (VCO) is the essential unit. Voltage controlled ring oscillator is mainly used for data communication. This paper mainly focuses on analysis and performance of single ended based VCO design and includes, tradeoffs between frequency generation, phase noise, area, power, etc. To meet high oscillation frequency with more stability and small on-chip area, an improved ring voltage-controlled oscillator (VCO), with substrate bias effect has been proposed in this paper. In ring VCO power dissipation plays a very important role as well as in nanoscale CMOS technology. The main purpose for the design is better performance and easy way of communication with variable high frequency and low power applications. The main advantage of the design is power consumption is less and working at very high frequency with low input-controlled voltage, because of use of substrate biasing technique. The simulation has been done by using mentor graphics 90 nm CMOS technology at room temperature 27C with supply voltage () of 3 V.