Hi first time poster. I'm a little stuck, through trial and error on Mentor graphics I was able to create the attached circuit. Using +&- 9V supply rails I managed to output -10mV, which I required. Now I have come round to try and work it out by hand i'm struggling to remember how! I know that the first part is basically a potential divider but how does this work with a positive and negative voltage?(adsbygoogle = window.adsbygoogle || []).push({});

Any help greatly appreciated

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# Help with voltage divider

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