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In this paper, we present a SOI CMOS Ultra-Low-Power (ULP) three-stage charge pump designed to interface photovoltaic (PV) cells co-integrated in the SOI substrate and used as a DC power source. Under an irradiance of 100W/m2, 2 PV cells in series provide a 815mV open-circuit voltage and a 21µA short-circuit current. Indoor measurements have been realized connecting them to one charge pump and the...
In this paper, we describe applications of a disruptive ultra-low-leakage design technique for drastically reducing the off current in CMOS mixed analog-digital microsystems without compromising the functional performance. The technique is based on a pair of source-connected n- and p-MOS transistors, automatically biasing the stand-by gate-to-source voltage of the nMOSFET at a negative voltage and...
In this paper, we present a microsystem for measuring optical power in blue/UV wavelengths (from λ = 200 nm to λ = 450 nm) which includes a photodiode and the analog processing circuit of the photodiode signal, fully integrated in 2 μm SOI CMOS technology. The photodiode has a maximum responsivity for λ = 400 nm. Th photosensor functions as a current to frequency converter. Measurements of the microsystem...
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