Design Examples
Several examples will now be worked out to demonstrate the concepts previously discussed
Antialias Filter
As an example, passive and active antialiasing filters will now be designed based upon a common set of specifications. The active filter will be designed in four ways: Sallen-Key, Multiple Feedback, State Variable, and Frequency-Dependent Negative Resistance (FDNR).
The specifications for the filter are given as follows:
1) The cutoff frequency will be 8 kHz.
2) The stopband attenuation will be 72 dB. This corresponds to a 12-bit system.
3) Nyquist frequency of 50 kSPS.
4) The Butterworth filter response is chosen in order to give the best compromise between attenuation and phase response.
Consulting the Butterworth ...
Get Op Amp Applications Handbook now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
