Apply Thevenin’s Theorem to Solve a Negative Resistance Circuit, or Current Source
Monday, February 14th, 2011Summary:
The circuit in Figure 1 is a good example of applying Thevenin’s Theorem to solve a circuit with dependent supplies. It is a negative resistance circuit and it was posted in this forum with a call for solution verification for IL as a function of Vin. Since this fits very well with my plans to write more about Thevenin’s Theorem, I decided to post the solution here.
How to Apply Norton’s Theorem. Solving Circuits with Independent Sources
Sunday, September 27th, 2009Summary:
Norton’s Theorem is a powerful tool for solving electrical circuits. Like Thevenin’s Theorem, it simplifies the circuit one needs to study and dramatically reduces potential calculation errors.
Norton’s Theorem states that networks with voltage and current sources, as well as resistors are electrically equivalent to one single current source and one single resistor in parallel with the source. The theorem is valid for AC circuits, where instead of resistors there may be reactive components. Since this theorem sounds very much like Thevenin’s Theorem, one can only imagine that Norton’s current source is equivalent with Thevenin’s voltage source. Indeed, they are equivalent as we will see further.
