Book-Tagged, that is. I'll get to the details here soon, but to pique your interest (and demonstrate the level of nerdy-ness I often shield ya'll from)... Here's the first book I looked at in my office.
Principles of Instrumental Analysis 5th Edition, Skoog, Holler, Nieman
Warning to all the following readers - It ain't horses. I'm an Analytical Chemist by career and paycheck... Pg 56 is in Chapter 3 Operational Amplifiers in Chemical Instrumentation
Bet'cha can't wait for that book detail... *giggle*