The second equalization circuit

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In the second equalization circuit connection method, and it works as shown in Figure 1-96. When the potentiometer wiper is moved lc inverting
The second equalization circuit - schematic

input terminal "a", the resonance impedance of the parallel combination of the feedback resistor R B is the minimum, the minimum amount of feedback and thus, the maximum gain of the circuit, corresponding to the frequency o and around the gain obtained promotion. When the potentiometer wiper move lC-inverting input terminal "+", the B input and lc R'o parallel resistance value of the minimum attenuation, so that the amount and rate of around fo signal input into the minimum voltage gain is attenuated.

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