Marechiare wrote:
>> Do you know the simple equation that the v(t) follows?
>
> You may wish to ask Olin.

That would be pointless since the purpose was to see if *you* know the
answer.

> His favourite job interview question to ask,
> if I am not mistaken, is about the equation of a voltage on a
> capacitance connected to a DC source through a resistor.

No, that's too easy.  Even a digital guy can get that.  My first question is
a very simple circuit with one ideal opamp and two resistors, and I ask for
a sketch of output voltage as a function of input voltage.  It's amazing how
many people don't get it or struggle with it.  The ones that use rules of
thumb for how opamps work never get it because this circuit deliberately
doesn't fall into the catagory where the "usual" rule of thumb works.  I
don't want the kind of engineer that relies on rules instead of
understanding.

Once someone gets past this moron-level question, then I throw a few more at
them until I have a good feel for what the candidate can and can't do.  It's
actually the thought processes I'm interested in watching more than hearing
the answer.


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