vp1953
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Hi Lorrenzo,
On further thinking I think i see your point, though it looks like a very complicated setup
- does your mixer have nearly same conversion gain at frf1 and frf3? - what about DC content at the output & dynamic range of the TIA (the output is not saturated or something like that?) - when you say something looks wrong, can you post a picture of this - also instead of a 10% difference in the resistor values, can you try a smaller difference of say 1%
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