Different set of application requires different set of parameters for a Voltage Controlled Oscillator design. Based on the earlier studies it was discovered that LC based VCO are having low phase noise for same power dissipation. However, as "Go Wireless" has become a trend for consumer electronics and caused a boom of demand for high performance, low cost, fully integrated transceivers, the interest in the VCOs based on the ring oscillators has grown significantly. This paper presents a performance analysis of various techniques used to design a Ring voltage Controlled Oscillator for different applications.

Index Terms: CMOS, DC source, Oscillator, VCO.