• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

2000 Gain Preamp circuit 20Hz/20kHz help?

Nigel Goodwin

Super Moderator
Most Helpful Member
If you look at the top of the General Electronics forum, there's a 'sticky' about just that!.



Well-Known Member
Most Helpful Member
Adding simple filters in series causes a droop in the frequency response before the cutoff, no sharp corner at cutoff.
An active filter uses an opamp to sharpen the cutoff corner, a Butterworth response has a sharp cutoff corner and a flat response before the corner.
An active second order Butterworth filter is twice as good as a single RC filter and higher orders are even better as shown here:


Latest threads

EE World Online Articles