to Build and Use Electronic Devices Without Fustration, Panic,
Mountains of Money, or an Engineering Degree. 2nd
Edition" by Hoenig.
I taught analog Electronic Instrumentation I used the 1st
edition of this book. I knew it was a winner when someone walked off
with my copy! Even the new edition is old (1980) and devices have changed
and improved a lot, but the simple electrical models for real devices
presented in this book have helped me in understanding potentiostat
This book is out of print, but
I'd recommend checking powell's or amazon for a used copy if you
really want to get a good grip on electronics design.