10kangstroms said:
Please post the exact form of Miller's theorem, and a cite for it. All references I have found totally ignore the alternate path around the amplifier.
Here you are:
1. Exact application of Meller's theorem.
For infinite f, the exact gain G =Vds/Vgs=1 (see the circuit of 21 Feb 2007 18:14); Co=C(1-1/G)=C(1-1/1)=0, and Vo=Vds=V1>0 (is not this effect of a zero?!).
2. Approximate application of Meller's theorem.
If you use an approximate (dc) gain: G<0, then Co=C(1-1/G)>0, and, for infinite f, Vo=0. This means no effect of zero.
Is not this simple?!
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Miller's theorem does not fail; APPROXIMATION DOES!