Power amplification interface circuit for broadband piezoelectric energy harvester

Amplifying energy from a broadband energy harvester requires interfacing of energy harvester with energy harvesting circuitry. To interface the harvester, a mechanical and electrical equivalent model is developed. The resonance frequencies of these models differ with the finite element model by less than 5%. A developed electrical equivalent model is interfaced with basic and synchronous circuit methodologies providing a maximum power of 38.32 mu W. A novel energy harvesting circuit consisting of the Schottky diode bridge rectifier and double voltage divider circuit is able to provide an output power of 27.87 mW.