Calc98 is a pocket calculator simulator program for the Microsoft Windows operating system. It is a replacement for the calculator program that is included with the operating system, with many additional features and greater flexibility.
So, what is a port? Figure 2a shows a two-port network. You can treat any circuit as a two-port network if you can select two pairs of nodes (for example, an input pair and an output pair) such that the current into the positive node of a pair equals the current out of the negative node of the same pair—that is, i 1 must equal i A and i 2 must equal i B in Figure 2a.
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