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PFB Noninverting Low Pass Audio Filter Circuit

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PFB Noninverting Low Pass Audio Filter Circuit
An excellent noninverting Low Pass Audio Filter circuit. 4 DB Gain from 300 to 1 KHz. 2 DB Gain at 2.5 KHz and 3DB down at 4.2 KHz. Input Impedance was tested using Multisim with a load of 1K on both the input and the output with no changes in the Bode Plot so excellent for insertion between low impedance input/output stages.