| 摘要 |
<p>Provided is a current measurement device which is capable of measuring a minute current within a wide range accurately and in a short period of time. The current measurement device comprises: an integration circuit (3) which integrates the current to be measured, and outputs an integration signal; a low range current measurement unit (4) into which the integration signal output from the integration circuit is input, and which calculates a low range current measurement value that is proportional to the rate of change of the integration signal; a high range current measurement unit (5) which calculates a high range current measurement value on the basis of a pulse signal corresponding to the cycle of the integration signal that is output from the integration circuit; a pumping circuit (7) which, using the pulse signal, discharges a charge stored in the integration circuit; and a measurement value determination unit (6) which determines a measurement value of the current to be measured, said measurement value being determined on the basis of the low range current measurement value calculated by the low range current measurement unit, and the high range current measurement value calculated by the high range current measurement unit.</p> |
