Found in a manual of integrated circuits from the 90s, this circuit makes use of that time components. It is indicated to limit the current in 6 V chargers.
This amplifier for hearing aid was found in a 1968 documentation using an integrated of the time....
We obtained this circuit from a 1993 documentation. The circuit has 9 current ranges that are...
In the figure we have the transmitter of a data transmission system with optical fiber suggested by...