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AssigneeHitachi, Ltd.
InventorsMakoto Torigoe, Hiroki Funato, Takashi Suga, Hideki Osaka, Yoshiyuki Tsuchie, Keisuke Fukumasu, Hitoshi Yokota
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Provided is a noise equivalent circuit required for completing an EMC analysis in a practical time and through a low-cost calculation process at an upstream stage of system design. According to the present invention, the noise equivalent circuit comprises: one or more energy sources; a propagation path for propagation of energy from the energy source including a conductive path such as a cable and an electromagnetic field coupling path due to the coupling of an electric field and a magnetic field with another electronic device or cable; and a GND port connected to a system, and is characterized in that each port is represented by the noise voltage source or the noise current source and the internal impedance. This noise equivalent circuit can be used to determine an external impedance that is varied depending on a load connected externally or the distance from an external device or a cable, whereby the noise of the system as a whole can be analyzed (see FIG. 1).
A noise equivalent circuit for evaluating noise propagating from a first electronic device in an actual system including the first electronic device, a second electronic device, a load connected to the first electronic device, and an external metal component disposed externally with respect to the first electronic device,
Dependencies are inferred from the claim text.