Abstract
A contactless scribe-line channel-leakage monitor with relaxed alignment requirement is described. It comprises photovoltaic converters for powering from indoor illumination, a visible light communication downlink for selecting one among multiple monitors, and an ultra-wideband impulse-radio uplink for transmitting the measured leakage data in the form of impulse repetition frequency. Readout is accomplished with an external loop antenna loosely aligned to the scribe-line transmitter antenna. The proposed monitor was implemented in 0.18-μm CMOS with a footprint 4960 μm \(\times \) 160 μm including the transmitter antenna. It deploys a novel leakage sensor of ring-oscillator topology. All circuit blocks, except for the transmitter, are power-supplied directly by photovoltaic converters without regulation, and consume 64 nW. Transmitter is powered by an integrated storage capacitor charged to 1.8 V by a photovoltaic-powered voltage booster.
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This work was supported in part by the Scientific and Technological Research Council of Turkey under Grant 116E256.
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A. Özdemirli and A. A. Yıldız were with the Department of Electrical and Electronics Engineering, Yeditepe University. They are now with Mikroelektronik Ltd.
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Özdemirli, A., Yıldız, A.A. & Çilingiroğlu, U. Contactless scribe-test monitor with photovoltaic power, VLC downlink and IR-UWB uplink. Analog Integr Circ Sig Process 108, 625–634 (2021). https://doi.org/10.1007/s10470-021-01844-9
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DOI: https://doi.org/10.1007/s10470-021-01844-9