A subthreshold current-sensing ΣΔ modulator for low-voltage and low-power sensor interfaces KU Leuven
Copyright © 2014 John Wiley & Sons, Ltd. A continuous-time (CT) ΣΔ modulator for sensing and direct analog-to-digital conversion of nA-range (subthreshold) currents is presented in this work. The presented modulator uses a subthreshold technique based on subthreshold source-coupled logic cells to efficiently convert subthreshold current to digital code without performing current-to-voltage conversion. As a benefit of this technique, the ...