Talk:Sallen Key filter

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There is no set attenuation level for the cutoff of the lowpass circuit. Its 3db frequency is 10222 Hz, not ~15kHz. ---

[edit] Transfer function

It'd probably be useful to list the transfer function here. 68.6.101.96 06:46, 19 May 2006 (UTC)

H(s) = \frac{V_{out}(s)}{V_{in}(s)} = \frac{R_1 R_2}{R_1 Z_1 + Z_1 Z_2 + Z_2 R_1 + R_1 R_2}
where the Z's are the s-domain impedances of the capacitors.
I think thats correct. Fresheneesz 22:57, 19 May 2006 (UTC)
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