Different configurations for constant current source design.

01 January 1970 1 5K Report

I've used several methods to design a constant current source. Emitter bias circuit with transistor, Howland current source, opamp negative feedback with transformer coupling etc. Among them, a configuration using AD620 instrumentation IC (mentioned in its datasheet) gives the maximum constant output with a larger load range, almost upto 10 k.

Any comment on your experience regarding constant current source design?

Jean Claude Delisle

Consider using AD8221 or AD8429. These are the next generation upgrade.

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