| 摘要 |
PROBLEM TO BE SOLVED: To provide a power circuit which is excellent in use efficiency of a chemical battery and besides is resistant to intermittent change of a load current. SOLUTION: In odd-numbered load burst periods, load L is driven by the power accumulated in a capacitor 16. In even-numbered load burst periods, the load L is driven by the power accumulated in a capacitor 17. Consequently, even if the duty ratio in the load burst period in one cycle when the load burst periods occur intermittently is 50% or over, the supply of energy in the load burst period is performed from a capacitor 16 or 17, and in the load burst period, a chemical battery 11 does not discharge. Therefore, the quantity of drop of a voltage value A by the internal impedance of the chemical battery 11 becomes small, so the operation life of the chemical battery 11 is extended by using this power circuit for an electric apparatus which ceases to operate by the temporary voltage drop of a power source. |
