Hi,
I'm working on a project, and I need an opamp used as a follower, but for practical reasons, instead of having a wire from output to -in, there will be a resistor (but no resistor from -in to ground)
Is this worse than a direct connection? Can this cause problems? Is there an optimal value (impedance matching between -in and +in?) ?
I'm working on a project, and I need an opamp used as a follower, but for practical reasons, instead of having a wire from output to -in, there will be a resistor (but no resistor from -in to ground)
Is this worse than a direct connection? Can this cause problems? Is there an optimal value (impedance matching between -in and +in?) ?
Check the data sheet for AD797,that opamp needs a 100ohms resistor in the feedback when used as a followerBricolo said:Hi,
I'm working on a project, and I need an opamp used as a follower, but for practical reasons, instead of having a wire from output to -in, there will be a resistor (but no resistor from -in to ground)
Is there an optimal value (impedance matching between -in and +in?) ?
Not with an current feedback opampBricolo said:isn't adding a small cap there always a good idea?
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