| 摘要 |
PURPOSE: A test mode circuit is provided to adjust capacitance by comprising a capacitance adjustment logic. CONSTITUTION: A switching group comprises a plurality of switching devices which are controlled by a control signal and are connected to the first voltage line in parallel. A capacitance group comprises a plurality of capacitances(C3,C4,C5) which are connected between the switching group and the second voltage line lower than the first voltage line correspondingly and perform a charging operation when the plurality of switching devices are turned on.
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