This circuit was suggested by National Semiconductor in one of its manuals. The LM108 integrated circuit, uncommon nowadays, can be replaced by an equivalent. The power supply must be symmetrical.
This circuit monitors the current of a series of 40 V lithium battery packs connected in series....
This 80's documentation circuit includes an amplifier of the era. Used integrated circuits are...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...