| 摘要 |
PROBLEM TO BE SOLVED: To provide a power generation circuit extremely high in energy efficiency, capable of being configured at low cost, and not bulky in size, and a transmitting device including the power generation circuit.SOLUTION: A power generation circuit 100 generating power by vibration and accumulating DC power includes: a first power generation unit Ucomprising a first piezoelectric element Pconverting vibration into an AC voltage, and a first parallel-connected diode dconnected to both electrodes of the first piezoelectric element P; a serially connected diode dconnected in series with the power generation unit U; and a capacitor Cconnected in series with the serially connected diode d. Thereby, a circuit is constituted of two diodes per piezoelectric element, so that a loss of power obtained by power generation can be reduced, and a power generation circuit having extremely high energy efficiency can be achieved. Further, the power generation circuit can be configured at low cost, and is not bulky in size. |
