What if my low-pass filter circuit has different R (ohms) and C (capacitance) values, and I'm using a 3rd order low pass filter? Do I add every resistor (R) and capacitance value (C)? Then I'd apply the formula?
1/[2*pi*(R1+R2+R3) * (c1+c2+c3) ]
Would that be right? ...
If I had another scenario with same values for R and C, do I need to add them as well?
This is the schematic I'm using: http://img810.imageshack.us/img8...
What's the cutoff frequency?
Thanks in advance.