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

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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.