| 摘要 |
PROBLEM TO BE SOLVED: To efficiently measure the capacitance of a capacitor in an LSI (Large Scale Integration) from the outside of the LSI. SOLUTION: The circuit for measuring the capacitance of a capacitor includes: a comparator circuit for outputting a comparison result by comparing a reference voltage with a voltage of a connection point to which a capacitor to be measured for capacitance is connected; and a current mirror circuit for mirroring a capacitor charging current supplied to the capacitor, wherein, the reference voltage and the capacitor charging current are input from an external LSI tester through an external input-output terminal that the LSI has, and the comparison result and the capacitor charging current are output to the external LSI tester through the external input-output terminal. COPYRIGHT: (C)2009,JPO&INPIT
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