Okay Chris. Thanks. Your explainations have helped me to understand better. A last question: " I think you will need the +/- 12.5A current to result in an input voltage that swings +/-1.5V around a 1.5V common-mode voltage. In this case you will probably need to fix one side of the shunt resister to 1.5V" Is is necessary to have common mode voltage of 1.5V ? What if I do not tie any one side of shunt to 1.5V. In that case, If zero current flows then the voltages at both ends will be same and hence the commonn mode voltage shall be zero. Is this of any concern. Regards Sushant
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