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| Self-Powered Pixel Design: The photodiode PD is operated in photovoltaic mode with zero bias. The voltage of the anode of PD increases to a level proportionate to the incident lightenergy. In this case PD draws zero power to produce a voltage proportionate to the incident light, and since it is not biased it does not produce any dark current. An important feature of the design is that emitter of transistor Q1 can be switched between ground (for resetting) and a power supply (for harvesting). |
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| Self-powered sensor assembly |
