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removing input dc offset

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Audette

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hi guys,
I am trying to designa SAR adc circuit. The input is provided by an image sensor which has a output offset voltage of 0.7V. The analog output can be of 200K to 5MHz frequencies.

I was thinking of using a capacitor to remove the offset. However, I am concerned with the frequncy, this may not be ideal.

Can anyone suggest a better way to do this please?

Thank you in advance.
Audette
 

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