Hi guys,
So I'm simulating a LPF with a non inverting op amp. I am doing a single supply design. My problem is the following : for I reason that I do not understand, my final gain stage (U6) makes the voltage output reference drift. My main supply is 5V, and my reference supply is 1.25V. When using a gain of approx 10, my output voltages is averaged around 1.35V. If using a gain of 50 for example, my new average DC value is 1.75V as I would have expected my signal to be centered around 1.25V.
Can anyone help me with this circuit ? Thank you very much.
So I'm simulating a LPF with a non inverting op amp. I am doing a single supply design. My problem is the following : for I reason that I do not understand, my final gain stage (U6) makes the voltage output reference drift. My main supply is 5V, and my reference supply is 1.25V. When using a gain of approx 10, my output voltages is averaged around 1.35V. If using a gain of 50 for example, my new average DC value is 1.75V as I would have expected my signal to be centered around 1.25V.
Can anyone help me with this circuit ? Thank you very much.
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