Abstract:
A current sensing VCO based ADC architecture is realized using a passive integrator, VCO-based quantizer, and mostly digital circuits. A digital IIR filter is used instea...Show MoreMetadata
Abstract:
A current sensing VCO based ADC architecture is realized using a passive integrator, VCO-based quantizer, and mostly digital circuits. A digital IIR filter is used instead of an analog loop filter to tackle VCO non-linearity in a power efficient and scaling friendly manner. The prototype circuit designed for an ambient light sensor application achieves 900pA accuracy over an input current range of 4μA, consumes a total of 77.8μA current, and occupies an active area of 0.36mm2 in 0.18μm CMOS process.
Date of Conference: 15-17 September 2014
Date Added to IEEE Xplore: 06 November 2014
Electronic ISBN:978-1-4799-3286-3