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Electronics => Beginners => Topic started by: firewalker on September 06, 2013, 05:09:49 pm

Title: Is this correct/usable (opamp V offset compensation)?
Post by: firewalker on September 06, 2013, 05:09:49 pm

Is something like the circuit bellow correct/usable for compensating the offset voltage of a jelly bean opamp?

(http://i.imgur.com/Ip8A8zAs.png) (http://i.imgur.com/Ip8A8zA.png)

Alexander.

Title: Re: Is this correct/usable (opamp V offset compensation)?
Post by: Dave on September 06, 2013, 05:28:45 pm

I don't think so. You are never going to have two completely identical opamps, so the offsets aren't really going to cancel each other out.

Title: Re: Is this correct/usable (opamp V offset compensation)?
Post by: firewalker on September 06, 2013, 05:34:58 pm

I was thinking the opamps on a same d?e. I am away fro a bench to test it.
 
Alexander.