TinaTi is a free Electronic circuit drawing and
simulation tool You can draw, simulate and test Your
idée, with some limits regarding component choice,
size and complexity in free version. And usage
This is a so called IA amplifier.
A circuit drawing is the start point of most
constructions, but rarely simpel as this one.
This could bee included infor exampel an analog
temperature sensor amplifier.
Usually You start with some
kind of real testcircuit