Thus, a shortcut procedure exists for loop analysis, and it is possible to write down relevant equations by inspection. To further illustrate this technique, consider the circuit of Figure 3.

The point was to show how to set up the open and closed loop equations with complex input and/or feedback impedances. Matlab is one of several programs that can be used to plot the open and closed ...

Author’s note: This article shows how to derive circuit gain equations via a signal flow graph. With practice you may be able to write a gain equation by ...