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The design of a 12.77-MHz on-chip RC relaxation oscillator with digital compensation technique is presented. To maintain the frequency stability versus temperature and supply voltage variations, loop delay tuning by a digital feedback loop is developed in this system. In order to generate an on-chip reference for digital calibration, a replica comparator is added. The on-chip relaxation oscillator...
This paper presents a 12.77-MHz low power, RC on-chip relaxation oscillator with self-compensation technique. A digital feedback loop is implemented to maintain the frequency stability. A replica comparator is added to generate a reference pulse width for the compensation. After compensation, the frequency is tuned by a digitally controlled delay element. The proposed design is fabricated in 0.18-μm...
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