The circuit in Figure 1 was given to me some while ago as a three-pole, active 1 dB Chebyshev lowpass filter. I never confirmed that its transfer function complied with the Chebyshev polynomial, but ...

This sketch is for a zero offset, two pole lowpass filter that was described in part 1 of this series. It’s transfer function and algebraically-calculated roll-off results are nothing special. The ...