Is there any rule to select the capacitor and resistor for active filters? Pls. suggest.
K Thread Starter kannan26nov88 Joined Feb 9, 2014 1 Jun 16, 2014 #1 Is there any rule to select the capacitor and resistor for active filters? Pls. suggest.
wmodavis Joined Oct 23, 2010 739 Jun 16, 2014 #2 Yes. Pick them so that the calculated roll off frequency is appropriate to the requirement of the design.
Yes. Pick them so that the calculated roll off frequency is appropriate to the requirement of the design.
atferrari Joined Jan 6, 2004 4,771 Jun 16, 2014 #3 For any practical design I suggest you to download this software. I used it many times with good results.
For any practical design I suggest you to download this software. I used it many times with good results.
crutschow Joined Mar 14, 2008 34,464 Jun 16, 2014 #4 There's also FilterPro software from Texas Instruments.
AnalogKid Joined Aug 1, 2013 11,055 Jun 16, 2014 #5 There is no single "standard" active filter circuit. Without getting into how many poles the filter is, there are functions: high pass, low pass, bandpass, notch... basic topologies: Butterworth, Cauer, Chebyshev (lotsa spellings for that one), Bessel... implementations: Sallen-Key, state-variable, bi-quadratic, gryators... and on and on. Wiki has a good starting page, but it goes on and on, and it does assume that you can handle some math. This is a large topic in EE. http://en.wikipedia.org/wiki/Active_filter ak
There is no single "standard" active filter circuit. Without getting into how many poles the filter is, there are functions: high pass, low pass, bandpass, notch... basic topologies: Butterworth, Cauer, Chebyshev (lotsa spellings for that one), Bessel... implementations: Sallen-Key, state-variable, bi-quadratic, gryators... and on and on. Wiki has a good starting page, but it goes on and on, and it does assume that you can handle some math. This is a large topic in EE. http://en.wikipedia.org/wiki/Active_filter ak