More UEGO stuff

[Mike Pitts]

Any interest?  Is this a waste of bandwidth?

"This invention provides an self-calibrating buffer amplifier 
for a Universal Exhaust Gas Oxygen sensor interface circuit 
which couples and processes a voltage signal proportional 
to pumping cell current to a level and reference voltage suitable 
for input to an A-to-D convertor. The goal of this invention is to 
increase the accuracy of air-to-fuel ratio control by continually 
correcting for the effects of offset quantities in the amplifier 
stage necessary to the interface circuitry. This goal is accomplished 
by an approach which effectively generates and subtracts these 
offset quantities from the processed signal. "

http://patent.womplex.ibm.com/details?pn=US05211154__

-Mike