FrozenOne said:
I am looking to map voltages from one point to another, in a specific
maner. For example:
11.7 to 3.7
12. to 5
12.5 to 12
Can this be done with an op-amp circuit???
Are there only three points or is it a continuum between 11.7 to 12.5?
Second, what is the precision? I see three significant figures, two
significant figures and one significant figure, which is it? Three
significant figures implies an accuracy and precision of 0.1% while one
significant figure can vary by 10%. This makes a big difference in how you
approach the problem and the precision of the resistors and non-linear
network required. There are also temperature and drift issues as well.
One poster mentioned using a microprocessor with ADC's and DAC's. It could
be a simple look up table to develop the relationship. Beyond that, can the
whole problem be done digitally without ever being in the analog, voltage
domain? That may be the best and simplest. In other words, where do the
voltages come from and how are the results used? It might be easier if those
were digital numbers and not voltages from the get go.