Current‐mode all‐pass filters represent a crucial class of signal processing circuits that, by utilising current signals rather than voltage signals, offer inherent advantages in terms of integration, ...

You already know about high-pass, low-pass, and band-pass filters – but don't forget the all-pass. No, I'm not kidding. It's not April 1st yet. The all-pass filter sounds a touch oxymoronic, like ...