Authors:-Babaso J. Lamkane, Archana A. Pawar
Abstract:-In this paper, high efficiency single-chip solar energy harvesting IC using on-chip solar cell for biomedical implant applications is presented. By inserting an on-chip charge pump with parallel connected photodiodes, a 3.5× efficiency improvement can be achieved when compared with the conventional stacked photodiode approach to boost the harvested voltage. A photodiode-assisted dual startup circuit (PDSC) is also used to improve the area efficiency and increase the startup speed by 77%. High efficiency system is implemented on 0.18-μm CMOS technology and it occupies an active area about 1.54 mm2. Here on chip charge pump is used so we get maximum 67% efficiency with incident power 1.22 mW/cm2.
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