This circuit is from Philips' 60s documentation. The circuit can be applied to modern operational amplifiers. The power supply must be symmetrical.
The sensor of this circuit consists of two 1N4148 diodes connected in series. The accuracy of the...
This setting appears elsewhere on this site. This was obtained from an 80's Circuit Encyclopedia and...
This circuit can be used as a direct optical link or by optical fibers. We found it in a...