1• First order circuits with Op AmpsECE 201: Lecture 26Borja PeleatoOperations• Op amps can add signals• Op amps can subtract signals• This lecture shows that they can alsodifferentiate and integrate2RC op amps• In previous lectures we studied several firstorder circuits with constant or step inputs,where capacitors or inductors got charged anddischarged exponentially with a time constantgiven by RTHC or L/RTH• Nothing would change if an op amp is in thecircuit. We would just find the RTHfrom theperspective of the capacitor or inductor, andapply the usual formula• However, we are now going to study a fewcases where the input (source) provides anarbitrary waveform3Differentiator4High pass filter5Waveform generation6Integrator7Low pass filter• An integrator attenuates high frequencies andamplifies small frequencies• Alternatively, it would convert a squarewaveform into a triangular one8Example910Example
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