A 0.35-µm CMOS Solar Energy Scavenger With Power Storage Management System
This paper presents an integrated solar energy scavenger realized in a 0.35 µm CMOS technology. The proposed system collects solar energy from the environment through integrated diodes, accumulates it and, delivers it to the load when it is enough to allow proper operation of the CMOS circuitry. The proposed system is suitable for discrete-time regime applications, such as sensor network nodes or, generally, systems that require power supply periodically for short time slots. In order to properly design the system, the author developed a model of the integrated solar cell on the basis of measurement data extracted from a test chip. The power management circuit, including a charge pumps a comparator and a linear voltage regulator, has been extensively simulated.