| 摘要 |
PROBLEM TO BE SOLVED: To greatly improve the simulation precision by connecting an inductance and an equivalent series resistance in series and finding a function of frequency from an approximate function, and then decreasing the number of pieces of necessary data. SOLUTION: The inductance L and equivalent series resistance R (R=ωL/Q,ωis angular frequency) are connected in series, and Q is represented as a function Q (f) of frequency (f) and approximated by a function (g) from Q (f)=g=g1×g2, g1=A×fB, and g2=1/(1+C×exp(D×f)). Here, g1 is a function of (f) selected as an approximate function of actual Q in a low frequency range; and f=0 and g=0. Further, g2 is a function of (f) selected so that its product with g2, i.e., g1×g2 is an approximate function of Q in a high frequency range; and g2=1 when f <<1, and g=0 when f=∞, and A to D are coefficients. Initial values of the coefficients A to D can be found not at random, but from coordinates of points on the actual characteristic line of Q by solving a quadratic equation.
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