The coarse calibration circuit controls a binary weighted biasing current source array, while the fine calibration circuit generates a pulse-width-modulation (PWM) signal to control a switched biasing current source. The proposed calibration circuit is composed of the coarse calibration and the fine calibration circuit. It uses a serial data signal from another chip as the frequency reference. ![]() IET Generation, Transmission & DistributionĪ frequency calibration method for a crystal-less current-controlled ring oscillator is presented.IET Electrical Systems in Transportation.IET Cyber-Physical Systems: Theory & Applications.IET Collaborative Intelligent Manufacturing. ![]() CAAI Transactions on Intelligence Technology.
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