LM324: Offset Voltage

Anonymous

Part Number: LM324

Is the input offset voltage or at least effective (what the input "sees") offset voltage for a particular configuration affected any by negative feedback?

over 8 years ago

0 Ron Michallick over 8 years ago

TI__Guru**** 171636 points

Handy,

I just finished reading about this very subject this morning.

http://www.ti.com/lit/an/snoa938a/snoa938a.pdf

0 kai klaas69 over 8 years ago

Guru 140200 points

Hi Handy,

input offset voltage of LM324 is hardly affected by the negative feedback, as long as the feedback loop properly works (the inputs are within their nominal range and the output does not saturate). Input offset voltage is mainly caused by the imbalance of PNP input transistors. And this has to do with fabrication tolerances.

Kai

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LM324: Offset Voltage