Op-Amp Integrator circuit design

[verd]

Hey there

This should be nice and simple. Here's the deal-- I was asked to design an Op-Amp Integrator circuit. For a 500Hz square wave input signal that oscillates from +/-0.5v, I was asked to design for a triangle wave output which oscillates from 0 to -5 volts.

I designed the circuit just fine, only problem is that it oscillates from about 0 to 5 volts instead of 0 to -5. I know these circuits have small offsets, so it's not exactly 0 to 5, but close enough. This is a stupid question, but I need a DC offset. I was under the impression that I could just stick a dc voltage source somewhere whose difference would bump the signal down some. But to no avail.

My R is 100 ohms and my C is 1uF-- which works perfectly in PSpice.


Any suggestions?


Thanks!

 

[learningphysics]

Do you need an offset or an inverter? Just wanted to check this since it seems from your description that you need an inverter...

 

[piercas]

Hello,

It sounds like you have successfully designed an Op-Amp Integrator circuit for the given specifications. However, you are experiencing some issues with the DC offset of the output signal. This is a common issue with Op-Amp circuits and can be caused by a variety of factors such as input bias currents, input offset voltages, and input offset currents.

One solution to this issue is to add a DC voltage source in parallel with the input signal. This will effectively shift the input signal up or down, depending on the polarity of the DC voltage, and can help to correct the DC offset in the output signal. Another solution is to use a DC-blocking capacitor in series with the input signal to remove any DC offset before it reaches the Op-Amp. It is also important to ensure that the Op-Amp being used has a low input offset voltage and current to minimize the DC offset in the output signal.

I would also recommend checking your circuit for any potential sources of noise or interference that could be affecting the output signal. This could include nearby power sources or other electronic components that may be causing fluctuations in the output signal.

I hope this helps and good luck with your circuit design!