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Old 23rd December 2004, 06:38 PM   #1
xcortes is offline xcortes  Mexico
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Default NIGC input impedance
What's the input impedance of a Gainclone? More specifically the BrianGT based NIGC.

Thanks!
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Old 23rd December 2004, 08:03 PM   #2
Franz G is offline Franz G  Switzerland
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Generally speaked, for noninverting opamps:

The input impedance = the resistor from input + to ground.

For inverting opamps:

The resistor in series with the (inverting) input.

Easy!

Franz
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Old 23rd December 2004, 08:38 PM   #3
xcortes is offline xcortes  Mexico
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easy indeed!

thanks
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