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Simple Adjustable Notch Filter Wiring diagram Schematic
Simple Adjustable Notch Filter Wiring diagram Schematic
Adjustable Notch Filter Circuit Diagram. In applications where the rejected signal might deviate slightly from the null on the notch network, it is advantageous to lower the Q of the network. This insures some rejection over a wider range of input frequencies. The figure shows a schema where the Q may be varied from 0.3 to 50. A fraction of the output is fed back to R3 and C3 by a second voltage follower, and the notch Q is dependent on the amount of signal fed back. A second follower is necessary to drive the twin `T` from a low-resistance source so that the notch frequency and depth will not change with the potentiometer setting.
Adjustable Notch Filter Circuit Diagram
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