| 摘要 |
Provided is a power supply apparatus including: a connection resistance that supplies a power supply current of an electronic device to the electronic device; a low pass filter that allows passage of an output voltage of a power current output section; a parallel load section that consumes a partial power current being a part of the output power current when receiving a power current decrease signal and stops receiving the partial power current when receiving a power current increase signal; an offset adder section that outputs a voltage obtained by adding an offset voltage to the output voltage of the low pass filter; and a difference detection section that supplies the power current increase signal to the parallel load section while a potential of a device side end of the connection resistance is smaller than a reference voltage obtained by subtracting a reference potential difference from the output voltage of the offset adder section, and supplies the power current decrease signal to the parallel load section when the potential of the device side end becomes larger than the reference voltage, where the offset adder section adjusts the offset voltage when the first reference potential difference is changed according to change in the output voltage of the low pass filter.
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