The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
This DC / DC converter was found in an American 1980s documentation. It provides a negative...
This low drift or offset circuit is from an 80's documentation. The configuration can be made with...
The integrated circuit used in this project is not common today, but it can be implemented with more...