The circuit shown is from the 1977 GE semiconductor manual. More modern equivalent SCRs can be used. R1 must be wire type.
We found this circuit in Sperimentare magazine number 4 of 1977. The magazine no longer exists, but...
This window comparator configuration is from a 1980 publication. It is a conventional circuit that...
In this circuit the gain decreases as the input signal intensity increases. The circuit is from a...