Power current model of LSI/IC containing equivalent internal impedance for EMI analysis of digital circuits

摘要

This paper investigates a device model of the power current used for an LSI/IC. The model is proposed to an- alyze the power bus noise in digital circuit boards. This model is defined in the frequency domain and constructed with an equiva- lent internal impedance and an equivalent internal current source. Accordingly, the output current of the model is affected by power Bus impedance, such as the capacitance of bypass capacitors and The parasitic inductance of power bus wiring. Therefore, the Model is useful for analyzing the effectiveness of bypass capaci- Tors and power bus wiring.