I actually have my circuit but i need to know just how the design is done could anyone please help

ericgibbs

Joined Jan 29, 2010
19,024
Hi 265,
Welcome to AAC.
The voltage offset should be applied to the AD620 Vref pin.
Using a single supply with a AD620 will give a Vout of ~0.7V, when the input is 0V.
Use the Vref to lift the Vout for Zero Vin to give say Vout =+1V.

E
 

dl324

Joined Mar 30, 2015
17,015
Whoever drew the schematic could have eliminated the "only" wire crossing if they had flipped that opamp...

Like National Semiconductor did about 50 years ago:
1709667344984.png
 
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