| 摘要 |
Methods and systems formulate the impedance for decoupling capacitors of a multiple power supply printed circuit board considering plane capacitance, series resonant frequencies, parallel resonant frequencies and impedance. The impedances are evaluated at anti-resonant frequencies, which have been found to be the problematic frequencies and potentials for high impedance. Once such impedance at selected frequencies have been determined, they can be compared to target values, set for example by various system integrity or EMI standards or design parameters, to assess whether a particular DC power supply system performs properly from signal integrity or electromagnetic radiation points of view. This ability to readily assess a high probability of compliance theoretically will reduce research and development time and budget, reducing possibly many iterations of board designs and trials and error physical testing.
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