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Design >> Mixed-Signal Design >> The transfer function of a SC integrator
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Message started by eeBismarck on Jul 31^st, 2012, 8:53am

Title: The transfer function of a SC integrator
Post by eeBismarck on Jul 31^st, 2012, 8:53am

Dear everyone, I am just starting to design the SC integrator. The one mentioned in the paper 'REDUCTION OF FINITE-GAIN EFFECT IN SWITCHED-CAPACITOR FILTERS' confused me as shown in the attachment.

I use the charge conservation scheme, but the result is different from the eq.1 in the paper.

Title: Re: The transfer function of a SC integrator
Post by buddypoor on Aug 2^nd, 2012, 6:31am

I don't know how deep you are involved in S/C techniques.
Therefore, the following hints:
There are three basic types of S/C integrators:
1.) EULER-forward approximation
2.) EULER-backward approximatiuon
3.) BILINEAR approximation.

The S/C circuit as shown in the referenced document is a specific development to consider parasitic opamp properties.
Which type are you going to design?