| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a correction device capable of effectively correcting the output voltage of an amplification circuit at a low cost.SOLUTION: A power measurement system 1 comprises: switches 8 and 10 for opening/closing an electric circuit 21 that guides an input voltage and capable of switching whether to place input terminals 5a and 16a in an open state or input a predetermined voltage to the input terminal 5a; an acquisition unit 4a for acquiring, in a first amplification circuit 5 that is in a first state, the initial value of a first correction voltage value outputted in a state in which the input voltage is cut off by each switch and the input terminal 5a is left open and the initial value of a second correction voltage value outputted in a state in which the input voltage is cut off by each switch and a prescribed voltage is inputted, and acquiring, in the first amplification circuit 5 that is in a second state, both of the correction voltage values; an arithmetic unit 4b for calculating, on the basis of each correction voltage value, an error included in the output voltage outputted by the first amplification circuit 5 that is in the second state; and a correction processing unit 4c for correcting, on the basis of the error, the output voltage outputted by the first amplification circuit 5 in accordance with the input voltage.</p> |
