Patent ID: 6571372
Filing Date: 2003-05-27
Classification: G06F

Abstract:
A method of measuring an electric circuit including the steps of:entering an equivalent circuit of said electric circuit, said equivalent circuit comprising a plurality of elements respectively having element values thereof; specifying a break point and a virtual ground in said entered equivalent circuit, said break point being for disconnecting an electric path for forming a closed-loop circuit; generating a 2-port network by disconnecting said electric path at said specified break point in said entered equivalent circuit so as to form first and second terminals that are two ends of said electric path, said 2-port network having a first port comprising said first terminal and said specified virtual ground, and having a second port comprising said second terminal and said specified virtual ground; calculating S-parameters of said generated 2-port network; and calculating a complete open-loop transfer function of said electric circuit in accordance with said calculated S-parameters, wherein said complete open-loop transfer function, G, is evaluated based on the equation, G=(S21âˆ’S12)/(1âˆ’S11S22), where S11, S12, S21, and S22 are said calculated S-parameters.