We found this circuit in a 1978 documentation. The SCR conducts when the regulator's output voltage exceeds the zener voltage.
The oscillator shown in the figure can generate signals from a few tens of kilohertz up to...
In the figure we have a trigger circuit using an SCS with a common incandescent lamp as load. The...
Found in a 1960 General Electric documentation, this crowbar circuit blows the fuse in case of...