Op amp instrumentation circuit diagram

Published:2011/6/24 2:36:00 Author:Ecco | Keyword: Op amp , instrumentation | From:SeekIC

In many cases, the op amp input end is connected to the capacitor to prevent DC level caused by virtual ground. This capacitor is actually a high-pass filter, in a sense, all single-supply op amp circuits like this have such a capacitor. Filter implementation is simple, but the designer must pay attention to the following points: 1. Filter inflection point (center) frequency; 2. the gain of the filter circuit; 3. Q value of of bandpass filter and band stop filter; 4. low-pass and high-pass filter types (Butterworth, Chebyshev, Bessell).



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