The discussion revolves around finding the Thevenin voltage equivalent between two points in a circuit that includes dependent sources. Participants explore methods for analyzing circuits with dependent sources and the conditions under which certain approaches are valid.
Participants express differing views on the applicability of the proposed method for finding Thevenin voltage in circuits with both dependent and independent sources. The discussion remains unresolved regarding the conditions under which the method is valid.
There are limitations regarding the assumptions made about the circuit configurations and the types of sources present, which are not fully explored in the discussion.
erezb84 said:Suppose i want to find the Thevinin Voltage equivalent between points a and b,
but there are dependent sources in my circuit that depend on the current between points a and b, how should i work?
Thanks!
gneill said:Put your own fixed current source, I, at a-b and use the usual analysis methods to find the voltage V that this current source must have across it while connected to the circuit. Thevenin resistance will then be V/I. Since you now know the Thevenin resistance, the output voltage V and current I, you can work out the Thevenin voltage that sits "behind" the Thevenin resistance to produce V.
I would think that it would work in all cases (superposition theorem), but I am willing to be corrected. Can you give an example where it would not work?jegues said:I can't quite remember, but this approach only works if the circuit consists of only dependent sources. (i.e. not a mix of independent/dependent)
Correct?