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  1. yarayara

    cheap voltage reference over temperature

    Hi, I want to build a cheap voltage reference for a circuit. I normally use a ZR431LF1 (Zetex voltage regulator), but I find it quite expensive. I though about using a Zener diode with a voltage follower, but it might not be reliable over temperature (-40 to +90°C). How can I build a voltage...

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