MD68
Newbie level 6
Hi All,
Howdo I figure out how to make one of these work? I know the basics and formula, but things like Offset Voltage and voltage drops across various places confuse me. How do I know how to choose the bias voltage and the sense resistor value? How do I know what kind of op-amp to use in the first place? What are the tolerances? What happens if I put a load on to it that requires more voltage than the + rail voltage to keep the current constant? What happens If i put a direct short across it instead of a load?
Thanks
Howdo I figure out how to make one of these work? I know the basics and formula, but things like Offset Voltage and voltage drops across various places confuse me. How do I know how to choose the bias voltage and the sense resistor value? How do I know what kind of op-amp to use in the first place? What are the tolerances? What happens if I put a load on to it that requires more voltage than the + rail voltage to keep the current constant? What happens If i put a direct short across it instead of a load?
Thanks