With matched optocouplers, 2 in a package one used for feedback, they can be used for analog signals. Try "linear optocoupler" in a webbrowser.Was it Elbert Smit who wrote on Wednesday 30 October 2002 16:33:Hello members,I'm trying to understand a specification, but it is not completely clear to me. Maybe someone can help me out. I have a current loop-a-like interface with optocouplers. This interfaces are not true 20mA current loop interface as familiar in the industry, but rather a current sensitive serial link.I didn't make too much sense of this. Are you trying to use an optocoupler in 'analogue' mode, or pulsing it? If the former, forget it quickly. The only way to use those things is as digital switches
Regards, Tinco
