switched cap circuit analysis

[anadigi]

Hello Frds,
I am posting 2 pictures.. Plz help me analysing these circuits..
Assume some intial conditions for the negative terminal of OPAMP..

The questions I hav in mind are:
1. Wht do these circuits do? Wht is the fundamental difference in working of these circuits?
2. Wht will be the effect of parasitic cap at negative terminal of OPAMP to overall performance?
3. Wht will be the voltage waveform at negative terminal of OPAMP?

All replies are welcome..
Thanx
Anadigi

 

[svensl]

The second TH is a inverting circuit which is parasitic insensitive. It is also non-delaying as a change in the input results in a change at the output. The first circuit on the other hand is parasitic sensitive. There is a good desciption in "analog integrated circuit design" by johns and martin on page 400 ff.