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A micro-power incremental delta-sigma (I-ΣS) ADC is presented. This ADC uses its decimation filter's output to estimate the input signal level and dynamically adjusts the modulator feedback voltage, thereby reducing the integrator input range and power. For further power saving, integrator time-multiplexing is also employed. Fabricated in 0.18µm CMOS, the 0.12mm2 ADC consumes 2.16µW at a conversion...
In this paper, we propose a CMOS image sensor with reconfigurable resolution for energy harvesting applications such as video sensor networks. Depending on the available energy, the spatial resolution of the imager can be adaptively reconfigured to save energy for other units on the sensor node. In contrast to early attempts of energy harvesting image sensor, we propose an asynchronous sensor in which...
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