| 摘要 |
A power supply device for supplying source current to an electronic device comprises: a current output unit for outputting output current including at least the source current as a component of the current thereof; a connection resistor which electrically connects the current output unit and the electronic device for supplying the source current to the electronic device; a low-pass filter for allowing the output voltage of the current output unit to pass through; a differential detection unit for detecting the electric potential difference between the output voltage of the low-pass filter and the electric potential at the device-side terminal of the connection resistor; and a parallel load unit which is connected to the output terminal of the current output unit in parallel with the connection resistor, and which has a function of consuming a partial current which is a part of the output current of the current output unit in a case that the electric potential difference detected by the differential detection unit is smaller than a predetermined value, and which has a function of stopping reception of the partial current in a case that the electric potential difference detected by the differential detection unit has become greater than a predetermined value.
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