Common Op-Amp Configurations
Wednesday, 10 July 2019
6:49 PM
Inverting
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Note: Even if there is a resistance at the
positive terminal (ie ), it does not contribute
to the circuit as there is no current flowing into the non-inverting terminal
Non-inverting
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Integrator
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A DC input would saturate the output, so we should add a large
resistor 
Choosing 
Differentiator
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Difference Amplifier
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Superimpose (Voltage due to + Voltage due to )
To find turn off
>> Like a non-inverting amplifier <<
To find turn off
>> Like an inverting amplifier <<
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Difference amplifiers have finite input.
Ideally we want a large input impedance into the op-amp, so we may use the following…
Instrumentational Amplifier
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Under perfect symmetry, we can break the resistor and specify a ground inbetween
And turn them both into non-inverting amplifiers
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