Signals-from-Noise - What Sallen-Key Filter Articles Don't Tell You - Part II
Part II: The ac constraints that you need to know
by Dave Van Ess, Principal Applications Engineer, Cypress Semiconductor

Last month's column introduced the Sallen-Key filter.

I included a seven-step process to specify the passive components to implement a filter with a particular roll-off frequency (f₀) and damping value (d). Also discussed was how the op amp dc parameters affect component selection. This TechNote will deal with the ac parameters and how they affect component selection.

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