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Demystifying Switched Capacitor Circuits
book

Demystifying Switched Capacitor Circuits

by Mingliang (Michael) Liu
June 2006
Intermediate to advanced content levelIntermediate to advanced
336 pages
10h 24m
English
Newnes
Content preview from Demystifying Switched Capacitor Circuits
Demystifying Switched-Capacitor Circuits
204
In a cascaded ∆Σ modulator, the capacitor mismatch or fi nite op-amp gain intro-
duces gain errors to the integrators and to the feedback DACs. The gain errors are
less important to the 1-bit feedback DACs since they are always linear (they become
much more pronounced when multibit DACs are used).
However, the gain errors in the integrators are more problematic. They cause the
modulator’s noise transfer function to deviate from its desired form, thereby weaken-
ing the effect of digital error cancellation logic and causing a noticeable error
leakage in the modulator’s fi nal output. Take the 2-1-1 modula ...
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Publisher Resources

ISBN: 9780750679077