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Get Butterworth Filter app old version APK for Android
Used to find epsilon (ripple) and order n given Amax, Amin (dB), Wc & Ws (rad/s)
This app prompts the user for Amax in dB (the maximum p-p variation in the passband of the filter), Amin (the minimum response attenuation), Wc in rad/sec (the upper end of the passband) and Ws (the upper end of the stopband). This calculates Epsilon (ripple) e as well as the Order, n. As an example, use Amax = 0.1, Amin = 60, Wc = 250 and Ws = 2000 and your results should be 0.15262 for Epsilon and 4.226 for the Order, n (see screenshot 2). If you change Ws to 500, then the Order n shoots up to 12.678 (see screenshot 3). Screenshot 1 is what you see when you first open the app, when no input has been added yet.What's New in the Latest Version 1.0
Last updated on Jun 7, 2013
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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Butterworth Filter app
1.0 by Randle C. Sink
Jun 7, 2013
$1.99