How to design active filters using Sallen Key circuits (2 - Active Filters)

[@jijitheneko]

im a singaporean watching this inside one of the University of Oxford's dorms, at least its good to know that nus engineering is doing good

[@robiny1162]

nice flex my man

[@Work-ec2uc]

Can anyone pls tell me why 2:32 the DC gain of the circuit is just K and K is varied from 0 to 3?

[@PetakyahBuckley-ht5iz]

I noticed the video is about sallen key filters, however the table at 3.20 literally says for Butterworth filters. I’m confused. Is the table really for sallen key filters and butterworth filters or was it going off topic for some purpose?

[@adanner]

Sallen-Key refers to the topology. Butterworth refers to the transfer function.

[@carlosivanhoemartinezosori4992]

The values from the table. Where can you find it? Any book you recommend ?

[@prateti9614]

Is the 2nd order sallen key LPF with 2 opamps better than 1 opamp version? Also how can one design the 2 opamp version ,2nd order sallen key LPF?

[@tomaszmar5391]

Please please please someone tell me how to calculate the K values for higher order filters

[@stefanopassiglia]

did you see the table at 3:30? Do you really need more than an 8th order filter? Anyway, just look up Butterworth filter tables.