We found this circuit in a 1980s American documentation. The operational amplifiers of the integrated circuit used can be common types in an experimental setup.
Vishay's VCNL4200 integrated circuit consists of a fully integrated proximity detector containing...
This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and...
We found this circuit in the 1994 Linear Applications Handbook from National Semiconductor. The...