METHOD FOR DERIVING EQUIVALENT CIRCUIT MODEL OF CAPACITOR

摘要

A method for deriving an equivalent circuit model of a capacitor which makes it possible to derive, with high accuracy and with ease, an equivalent circuit model having characteristics in accordance with a direct current voltage applied to a capacitor. Characteristic values of predetermined resistive elements and capacitive elements forming an equivalent circuit model of a capacitor change in response to a DC bias voltage being applied to the capacitor, and the change is attributable to the material of a dielectric forming the capacitor. However, by multiplying the characteristic values of the resistive elements and the capacitive elements held while the DC bias voltage is not applied by a dimensionless coefficient in accordance with an application rule, the characteristic values of the resistive elements and the capacitive elements are corrected to values in accordance with the voltage of the DC bias voltage applied to the capacitor.

主权项

1. A method for deriving an equivalent circuit model of a capacitor that is formed by a resistive element, a capacitive element, and an inductive element, the method comprising:
expressing a rate of change in a characteristic value of the element of which the characteristic value changes as a direct current voltage is applied to the capacitor as a dimensionless coefficient on the basis of a rate of change in the characteristics of the capacitor attributable to a material of the capacitor; multiplying the characteristic value of the element, of which the characteristic value changes in response to the direct current voltage being applied to the capacitor, held while the direct current voltage is not applied by the dimensionless coefficient; and correcting the characteristic value of the element to a value in accordance with the direct current voltage applied to the capacitor.