Pole Splitting equation question

[bitrex]

I'm trying to follow along with the equations on the wikiepdia page for pole splitting: http://en.wikipedia.org/wiki/Pole_splitting. However, I'm having a bit of trouble understanding the equation about halfway down that relates the load output to the amplifier input, Vl/Vi. Where does the zero in the numerator in the transfer function come from, that term divided by the amplifier gain? I thought the transfer function for the output network would be essentially identical to that of the input network, just with Cc in parallel with Cl. Thanks for any insight.

 

[The Electrician]

Send me a PM with a valid email address, and I'll send you some material from old journals and magazines on the topic.