69. Twin T Notch Filter

This is an elaboration (improvement?) on video 68. Band Stop Filters (link below). I didn't discuss Twin-T filters as well as I should have so I decided this addendum was needed. We talk about how the lower and upper critical frequencies (-3dB points) are determined as well as finding the geometric center of this very wide band device. A course of bread boarded circuits follow.
68. Band Stop Filters
• 68. Band-Stop Filters