Wednesday, 2 August 2017

operational amplifier - Opamp operation with "unbalanced" power supplies


Usually the way to operate an opamp is to feed a +V and a -V of the same magnitude but opposed polarity. Or, just +V and GND.


But now, I need an opamp's output to be In a different range. About -1.25V to +28V. The opamp i have is an MC4558, which has a supply voltage (max) of ±22V.



Can I supply this with, say, -3V and +33V? The configuration I'm using is drawing "B" in this answer: Setting LMC6001 offset voltage


Some opamps, like the LM324, say supply can be 0-36 or ±18V. This one only mentions ±22V. It doesn't say 0-44V.




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