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6th April 2011, 11:01 AM
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#2 |
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diyAudio Member
Join Date: Feb 2007
Location: ΔΡΑΜΑ - North Greece
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It needs a cap only across the feedback resistor of the second OPA. With the aid of a square wave generator (at 10KHz) and a scope connected in output,try values between 22pF to 220pF to find where the overshoot of square is eliminated.
For the input impedance calculation, you may ask the help of AndrewT. |
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compenstation cap for 2nd order allpass delay circuit
