Suggested by Philips documentation from 1968, this circuit uses components from the era that can be replaced by modern equivalent types. The double transistor can be replaced by a matched pair.
This circuit was found in a Hands On Electronics with the suggested application an optical link for...
This circuit uses a 6-bit A / D converter from Philips, and has its output compatible with most...
We found this circuit in an early American 80's documentation. We note that the first gate of the...