Requesting some input on this topic which has already been discussed (partially for my requirement) here: Negative to Positive Voltage Converter
I also have a positive-only display and I need to measure up to -32v DC. I need to convert the minus voltage to the positive equivalent in a simple manner and I am currently thinking of doing this in TWO op-amp stages as illustrated.
Questions: 1. Is there a more elegant & simple way to do this? Using only one op amp perhaps? The limit on +/- supply is a limiting factor hence my 2-stage design. 2. Does anyone see a problem doing it this way? This is a basic block diagram only.