In Reply to: opamp offset compensation? posted by I.T. on 12/07/00 at 2:42 AM:
The 741 op-amp has two pins devoted to offset null, pin 1 and pin 5. There is a sketch near the end of a posting at http://www.ibiblio.org/kuphaldt/Semi/opamp.htm which shows an offset nulling 10K potentiometer connected between pins 1 and 5 with the slider connected to the negative rail. You adjust the potentiomter for minimum offset.
A question however: The 741 is a thirty-two year old product and better devices are available, especially regarding input offset bias currents which can cause difficulty. Have you considered a different device choice?
John Dunn - President