Bridged Tunable Notch Passive Filtes

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Description

SPICE simulation of a four bridged tunable filters with a precise ratio of their components. With this ratio the notch frequency is Fnotch= 1/[6.28*C*R* SQRT( 3*x*(1-x))], where x that ranges between 0 and 1, can be considered the position of a potentiometer.

  • magnitude and phase response of four filters 185 hz frequency notch 420 hz frequency notch 1300 hz frequency notch 4100 hz frequency notch

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