sallen key filter
- Thread starter vustudent
- Start date
The generalized SK form is not necessarily unity gain - that's just one option.
See here...
http://focus.ti.com.cn/cn/lit/an/sloa024b/sloa024b.pdf
See here...
http://focus.ti.com.cn/cn/lit/an/sloa024b/sloa024b.pdf
For a Butterworth lowpass filter:
1) If the opamp has a gain of 1 then the feedback capacitor must have a value that is double the value of the capacitor to ground.
2) If the opamp has a gain of about 1.6 then the capacitors and the resistors can have equal values.
1) If the opamp has a gain of 1 then the feedback capacitor must have a value that is double the value of the capacitor to ground.
2) If the opamp has a gain of about 1.6 then the capacitors and the resistors can have equal values.
