Hello everyone. Please help me to understand a thing.
I try to eliminate DC component of an input triangular wave. Average value 7.5V and peak to peak value 5V (so from 5 to 10V). Frequency varies from 200Hz to 40 kHhz. I also want to amplify it (about 3x but anyway).
I use an op amp (opa277).
What should I worry about with this configuration? (see figure).
I think even for low frequency it should work, common mode input resistance of my op amp is something like 250 GOhm, therefore even at 200Hz (1/sC= 800kOhm) I shouldn't have attenuation in the forming voltage divider. The other components are all odd multiplies of 200Hz so I don't have anything below this frequency right? I'm afraid of loosing amplitude because of that, or to ruin the quality of my waveform.
Unfortunately my simulator suffers because of that long needed time constants till it gets alternating and so its computationally difficult for me to check it. I don't have any way to check it practically (still closed laboratory because of covid). I hope your theoretical knowledge would help me.
I try to eliminate DC component of an input triangular wave. Average value 7.5V and peak to peak value 5V (so from 5 to 10V). Frequency varies from 200Hz to 40 kHhz. I also want to amplify it (about 3x but anyway).
I use an op amp (opa277).
What should I worry about with this configuration? (see figure).
I think even for low frequency it should work, common mode input resistance of my op amp is something like 250 GOhm, therefore even at 200Hz (1/sC= 800kOhm) I shouldn't have attenuation in the forming voltage divider. The other components are all odd multiplies of 200Hz so I don't have anything below this frequency right? I'm afraid of loosing amplitude because of that, or to ruin the quality of my waveform.
Unfortunately my simulator suffers because of that long needed time constants till it gets alternating and so its computationally difficult for me to check it. I don't have any way to check it practically (still closed laboratory because of covid). I hope your theoretical knowledge would help me.
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