Butterworth circuits come in both low- and high-pass versions, as well as ideal, Sallen-Key, emitter follower and DC accurate ...

I’ve blogged how I trying to assemble a group of filter fanatics. I that post I mentioned that I had a great article coming from Chris Paul, an engineer at Motorola. Well it took a while, but we ...

We consider first the biquadratic active- RC sections that use a single op amp, configured in either an inverting (negative-feedback) or noninverting (positive-feedback) mode, in a single-loop ...

Almost all efforts immediately constrain implementations by unity gain in the op amp, equal R or equal C, or both. When multi-stage filters are implemented with gain, most of the gain is placed in the ...

Though sometimes taken for granted, designers shouldn’t overlook the intricacies of voltage- and current-feedback op amps—integral players in the analog and mixed-signal worlds. Op amps amplify tiny ...