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A fully-integrated DC/DC converter for energy harvesting applications is presented. The startup-voltage of the converter is about 140mV, the output voltage exceeds 1.5V, with a power efficiency at least 20%. The architecture for boosting such extremely low voltages is based on an ultra-low-voltage oscillator cross connected to two phase charge pump. The overall circuit does not require any external...
The impact of the energetic disorder and the charge localization on the conductivity, mobility and carrier concentration is investigated both theoretically and experimentally. This study gives three fundamental results: (i) the magnitude of the conductivity is strongly dependent on the spatial charge localization but (ii) the conductivity as a function of temperature and Fermi level is independent...
High-resolution radars require the transmission and reception of extremely high-bandwidth pulses. The generation of such pulses is a challenging task, especially for low power portable applications. In this paper we present a new approach to face this problem. The proposed approach uses a standard negative impedance LC oscillator to generate fully-differential pulses in the 6 to 8GHz frequency range...
A new charge pump circuit is presented: it is based on PMOS pass transistors with dynamic control of the gate and body voltages. By controlling the gate and the bulk of each pass-transistor, the voltage loss due to the device threshold is removed and the charge is pumped from one stage to the other with negligible voltage drop. Compared to conventional charge pumps, it exhibits a larger output voltage...
A generalized version of the small-signal drift-diffusion model accounting for trapped charge dynamics is presented; the explicit introduction of two new continuity equations for the trapped electrons and holes is avoided by incorporating them in the original three equations, thus allowing for easier implementation while mantaining the same degree of accuracy of the full system. Simulations carried...
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