| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric source device and which is small in impedance in a signal transmission line; and a test device. SOLUTION: An electric source device comprises a voltage source for generating a desired voltage; a current measuring element which is provided between a load and the voltage source and receives the desired voltage from the voltage source; a plurality of impedance conversion circuits which are provided respectively in parallel between the load and the current measuring element, and in which an output impedance is smaller than that of the current measuring element; and a plurality of transmission lines by which the load is electrically connected to each of the plurality of impedance conversion circuits. The impedance conversion circuit is provided between the load and the current measuring element, thereby excluding influences due to the impedance of the current measuring element on a load side.
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