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Op-amp Circuit 4

Basic circuit for bass preamp

Use the sliders to change circuit values and view result in the plot below. The button switches the circuit input.

Version 3, December 2014

C2 2.2nF R3 220kΩ R2 33kΩ R1 820Ω C1 47μF in non-inverting Circuit 4
100Ω1MΩ
10nF470μF
100Ω1MΩ
100Ω1MΩ
10pF220nF
90 80 70 60 50 40 30 20 10 gain dB 1 10 100 1k 10k 100k frequency Hz non-inverting inverting 2-stage non 2-stage inv Plot 4

How it works

For the non-inverting op amp circuit shown: Gain (dB) = 20.log10 [ 1 + ( [R2 + XC2//R3 ] / [R1 + XC1 ] )], where XC2//R3 = ( XC2 x R3 ) / ( XC2 + R3 ). and XC = 1 / 2πfC.

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