Figure 6 Equivalent circuit showing a pot moved upward from center. The input goes to the noninverting input of an op amp. The output of the op amp connects directly to the inverting input making it a unity gain buffer. The output of the op amp goes through a 1.2 k ohm resistor to the noninverting input of the second op amp. The noninverting input also goes through a 5 k ohm resistor to ground. The output of the second op amp goes through a 1.2 k ohm resistor to its inverting input. The inverting input also goes through a 5 k ohm resistor to ground. The inverting input also goes through one of the RCL series circuits to ground.
End of verbal description.
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