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Can someone pls tell me how to feed a square wave into this circuit.
thx
thx
Feeding A Square Wave Into An Integrator
- Thread starter elec_newbie
- Start date
How about using a voltage source with the PULSE generation parameters.
The source you are using lacks several of the parameters like rise time, fall time, on time, and period. Like this:
It should be noted that a 741 does not behave well when operated with a single power supply.
The source you are using lacks several of the parameters like rise time, fall time, on time, and period. Like this:
It should be noted that a 741 does not behave well when operated with a single power supply.
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It usually works okay as long as the common-mode input, and voltage output limits are observed.
The bandwidth and slew rate are nothing to write home about.
Agree with that.
Attachments
Ideally no, but for the frequency response of the LM741 it is normal.
Its low frequency response allows feedthrough of the fast rise input change at the square-wave edges directly through the feedback capacitor, which then appear at the output.
The 10ns rise/fall times in you simulation has a very high frequency Fourier component of about 35MHz.
If you look at the spike at the (-) op amp input and compare that with the output spike, you will see they are essentially identical (second attachment).
If you reduce the square-wave rise and fall times to 10µs, which gives the op amp time to respond to the change, my simulation shows no spikes at the triangle peaks (first attachment).
Attachments
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Excellent. TY for your help folks!
