Coaxial Cable Driver (CB20923E)

This National Semiconductor circuit uses an operational amplifier that is uncommon today. The power supply must be symmetrical.

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Star Alternator (CB20067E)
In the figure below we have the typical circuit of an automotive star alternator with the...
Passage Alarm (CB18792E)
This simple pass-through circuit was obtained in an old documentation, but it is still up to date...
Current Regulator (CB13425E)
This circuit was obtained in a 1974 National Semiconductor components and circuits manual. The...