The picture above shows my circuit design.
The reason for using RG up to 1000Ω is that the driving ability of our DAC is weak , especially when testing linearity, which requires a large output amplitude.
The reason for using a 2V/V close loop gain is to compensate for the amplitude attenuation caused by impedance matching at the output of LMH5401.
The reason for using 40000Ω RS is to achieve a noise gain of>3V/V.
This circuit is mainly used to test the linearity of DAC and does not care about noise characteristics,is the above design feasible?
Thanks.
