| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and method to identify regions where voltage supplied by the power distribution network of an IC chip is too low (or too high). SOLUTION: Virtually uniform voltage is impressed on the power surface of the power distribution network connected to the IC chip. A plurality of current sources distributed over the chip are turned on. Voltage in a plurality of positions on the chip is sought. When the current source is turned on, a clock that works freely on a clock tree distributed over the chip becomes effective, and the operation of a function logic inside the IC is prohibited. COPYRIGHT: (C)2009,JPO&INPIT
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