Power management circuit, electronic device and wireless sensor

摘要

PROBLEM TO BE SOLVED: To provide a power management circuit which can prevent power depletion in an electronic apparatus.SOLUTION: A power signal selection unit 110 receives power signals input to respective input terminals P1 and P2, and selects the power signals from one energy harvest element EH. A power circuit 120 stabilizes the power signals output from the power signal selection unit 110. A detection circuit 130 detects power generation quantity of respective energy harvest elements EH1 and EH2. The power signal selection unit 110 selects power signals from one energy harvest element EH on the basis of the power generation quantity of the respective energy harvest elements EH1 and EH2 detected by the detection circuit 130.