Abstract
A relaxation oscillator for high accuracy application is proposed in this paper. A Dynamic-Threshold (DT) concept is introduced to obtain low power-sensitivity characteristics of frequency, Switched-Resistor (SR) is adopted for frequency stability to temperature and current trimming is also utilized to compensate process drift. Simulation with typical frequency of 5MHz was conducted in 0.18μm CMOS process and shows that the peak error of oscillator’s frequency is 0.41% with supply variation of ±10% and temperature drift is only 8.2ppm/°C. The frequency inaccuracy is less than 0.3% via digital trimming for 20% offset of resistances.
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Yu, Q., Xu, Z., Ning, N., Guan, Y., Chen, B. (2011). Design of a Relaxation Oscillator with Low Power-Sensitivity and High Temperature-Stability. In: Zhu, M. (eds) Electrical Engineering and Control. Lecture Notes in Electrical Engineering, vol 98. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21765-4_53
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DOI: https://doi.org/10.1007/978-3-642-21765-4_53
Publisher Name: Springer, Berlin, Heidelberg
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