Analysis of capacitance inductance impedance model and experience in selecting decoupling capacitance of power supply

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1, summary

     The impedance of an ideal capacitor is capacitive , The impedance is frequency dependent 1 A negative complex number . The impedance of the inductor is inductive , The impedance is frequency dependent 1 A positive plural . For a practical capacitor , It is not only 1 A capacitor , There are also parasitic resistors and inductors inside . Deeply understand the capacitor model and its impedance calculation method , It will be very helpful for the selection of decoupling capacitor of power supply .

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