I have found the formla! Sorry I don’t know how to attach file here, so please click the link get my article: my blogger In this paper I given the formula of equivalent resistance for arbitrary ...

More often than not a question pops up in our forum about speaker impedance and the result of connecting multiple speakers to a single amplifier. Thus we have prepared this introductory tutorial to ...

The recent EDN article of Bruce Trump () on the input impedance of an op-amp circuit took into account the single-pole roll-off of its loop gain. He showed with a simple derivation how the equivalent ...