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?
Butterworth is the overall transfer function for the system of cascaded sallen keys For example a 6th order butter worth LPF can be implemented by cascading 3 sallen key LPFs, each of which has some specific cutoff frequency and Q you get from the table
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
nice flex my man
The values from the table. Where can you find it? Any book you recommend ?
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?
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?
Sallen-Key refers to the topology. Butterworth refers to the transfer function.
Butterworth is the overall transfer function for the system of cascaded sallen keys
For example a 6th order butter worth LPF can be implemented by cascading 3 sallen key LPFs, each of which has some specific cutoff frequency and Q you get from the table
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?
Please please please someone tell me how to calculate the K values for higher order filters
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.