NOISE EQUALIZING CIRCUIT

摘要

Provided is a noise equalizing circuit that is required for terminating an EMC analysis in a practical time by use of a low-cost calculation process at an upstream stage of a system design. This invention is characterized in that the invention is a noise equalizing circuit comprising: one or more energy sources; conduction paths constituted by cables or the like and serving as propagation paths along which the energies from the energy sources propagate; electromagnetic-field-coupled paths established by the couplings of the electric and magnetic fields occurring between the local electronic device or cables and other electronic devices, cables or the like; and GND ports connected to the system, each of the ports being expressed by a noise voltage source or noise current source and an internal impedance. This noise equalizing circuit can be used to determine an external impedance that varies with the distance from an externally connected load or an external device and cable or the like, whereby the noise of the whole system can be analyzed (see FIG. 1).