Locked solid state relay (CB8394E)

We found this circuit in a 90s Electronic Design. The components admit current equivalents. The circuit can act as a shield.

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Noise Limiter (CB19074E)
We found this circuit in an English documentation from the 60s. The integrated circuits are the...
Precision differential amplifier (CB20907E)
This circuit has a 60 dB gain and a bandwidth of 68 MHz. We find it in Maxim's documentation. ...
Protected Power Transistor (CB389E)
The aim of this circuit is the protection of a 2N3055 transistor, avoiding the overheat. The...