To calculate self and mutual inductance of coreless transformer in printed circuit board, The author offered a new method to calculate based on Neumann equation as well as testing process and circuit.

为了计算印制版空芯变压器的自感和互感，提出一个以纽曼公式为基础的新的计算方法，并给出了测试方法和测试电路。

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Arranging chip capacitors (20) in a printed wiring board (10) makes it possible to reduce the distance between an IC chip (90) and the chip capacitor (20) and to reduce the loop inductance.

因为在印刷布线板10内设置了片状电容器20，所以能够缩短IC芯片90与片状电容器20的距离，降低环线电感。

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