A stable and low power on-chip system clock circuit for sensor nodes and low Power Timers
نویسنده
چکیده
In this paper we present a 2μW temperature compensated on-chip digitally controlled oscillator and a 70nW uncompensated, ultra low power oscillator. The temperature compensated oscillator has a temperature stability of 8ppm/C while uncompensated oscillator has a stability of 4%/C. The uncompensated oscillator is calibrated using stable oscillator often to achieve high effective temperature stability. This combination gives us a stability of 8ppm/C @ 250nW if temperature changes by 1C every second. A calibration scheme for the oscillator is also presented.
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