Why Use Thevenin Equivalent Circuits?
Whenever you need to predict how something is going to behave you don’t need to analyze things down to the lowest possible level. For example, when current flows in a resistor, you don’t need to know what happens to every atom in the resistor. That ability to describe what happens to a large number of atoms in the resistor by using a macromodel for the resistor is convenient. Electrical engineers often think at different levels of complexity. • When analyzing/describing an amplifier circuit or a digital logic circuit the designer uses a macromodel for the resistors, transistors, capacitors and other components and doesn’t worry about what happens inside those components. • When analyzing/describing a logic chip the designer uses a macromodel for the gates in the logic circuits, and doesn’t worry about the transistors, etc. that comprise the innards of the logic circuits. • When analyzing/describing a computer, the designer uses a macromodel for the logic chips and doesn’t worry about t
