responses of the approximations and frequency magnitude responses for the approximation error transfer functions show similar results as in Example1 and thus arenot shown again.
M. Nahvi, A. Ivanov · 2004
VI. CONCLUSION We propose a method to obtain second-order approximations for transfer functions in RLC trees. Examples show that the two-pole one-zero approximations give improved accuracy over the existing second-order approximations in terms of step response, frequency response, estimated delay time, and rise time. The results can be used to quickly estimate signal delay and other parameters in RLC trees.