Performances analysis and optimization of micro power ring oscillator for energy scavenging applications using the contour Graph method

This paper mainly focuses on performances optimization and analysis of micro power ring oscillator for energy scavenging applications in wireless sensor networks. A novel method of optimizing electrical performances (power, frequency) and geometry (transistors sizing) for CMOS ring oscillators is presented using the contour Graph method. The optimized oscillator exhibits a tuning range from 10 MHz to 100 MHz with good transient characteristics for a supply range of 0.8V to 1.6V and small size die which is difficult to get from the conventional oscillator. This frequency range is provided under low power consumption.