Design of improved performance voltage controlled ring oscillator

Abstract

Voltage Controlled Oscillator is one of the most important basic building block for analog, digital as well as in mixed signal circuits. This paper presents a new technique to improve the performance of ring oscillator. The VCO is based on single ended ring oscillator. The circuit is designed using 0.13 CMOS technology with supply voltage of 3.3 V. A VCO with high frequency range from 2.26GHz to 3.50 GHz is achieved by using this technique. Simulation results reveal the better performance of the proposed design as compared to existing current staved ring VCO in terms of oscillation frequency and power consumption.