The Bainter notch filter uses a more complex circuit but separates the Q of the circuit from the components that determine the notch frequency. The process for the calculation of component values is not trivial, and is covered on the “MT-203”
The article provides an overview of band pass and band-stop (notch) filters, explaining their frequency responses, key characteristics, and circuit configurations using LC components.
Notch Filter Summary With little to no attenuation at all other frequencies, notch filters are engineered to offer strong attenuation at and near a single frequency. To achieve a deep notch, notch filters use a twin-T parallel resistance-capacitance (RC)
Notch filters by design have a very narrow and very deep stop band around their center frequency with the width of the notch being described by its selectivity Q in exactly the same way as resonance frequency peaks in RLC circuits.
Notch filter circuits are normally used for suppressing, nullifying, or cancelling a particular range of frequencies in order to avoid an annoying or unwanted interference within a circuit configuration.
![[老葉說事-112期]一次搞懂：陷波濾波器(Notch Filter)的原理](https://i.ytimg.com/vi/KxC0a-O8Jys/hqdefault.jpg)
