Lena/Oct 2016: Difference between revisions

I want to replace this circuit with something that can output both sum and difference, so that the common mode variations can be cancelled. Apparently a circuit that is supposed to do that [[Lab_equipment/NE43500|has already been designed (see the link)]]. The circuit has very little documentation and needs to be modified to increase the gain. We need 1-2 μA/V on the differential channel and 100-200 μA/V on the sum channel.