Hi,
I'm trying to determine the order of a circuit, and I'm a bit confused. From my analysis, I get an order of 3, but the official solution says it's 2.
The circuit includes inductors and capacitors, and I tried transforming them into equivalent series and parallel models. However, I don't see how it's possible to combine the oscilloscope input capacitance Co with the circuit in a way that would reduce the order. Nothing in the statement suggests that a series or parallel transformation of Co is valid.
I also computed the transfer function at the output, and the denominator ends up being second order. Is this method valid to justify that the circuit is second order?
Especially since the question only asked for a brief one-sentence justification, doing a full transfer function derivation seems excessive. The solution just says that Co can be combined, but I don’t clearly see why.
Thanks!
