This voltage-to-current converter delivers a variable 4mA to 20mA output (0V to 1V input) using only a positive power-supply rail. R S is selected so that the first term gives 16 mA for full-scale ...
This design will interest technicians who work on pneumatically operated valves and other 4-20mA current loop controlled devices. Although 4-20mA signal injector/calibrators are available, this one is ...
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