
Re: mutual capacitance?
Posted:
Jun 17, 2011 4:31 PM


On Jun 17, 1:49 pm, RichD <r_delaney2...@yahoo.com> wrote: > A network theorem states that every circuit has a > dual; voltage sources become current sources, etc. > > But, what about mutual inductance? Why is there no > mutual capacitance? By symmetry, shouldn't a 'mutual > capacitor' exist, linking electric flux? > >  > Rich
The other day I wanted to determine the corner frequency of an RC circuit that feeds into an opamp. I couldn't 'break' into the circuit to inject a little test signal, so I wrapped a bit of plastic coated wire about the lead going into the opamp. This formed a bit of ? mutual? capacitance between the wire and lead. (Each has separate capacitance to ground.) I then sent a square wave into the wire, and this gave me little charge pulses into the opamp/ RC circuit.
I'm not sure if this maps mathematically into mutual inductance,
George H.

