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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DC multiplier LM339 (CB15190E)
This circuit was obtained in the SGS manual of linear integrated circuits of 1982. The components used...
Head or Tail (CB20332E)
This simple transistorized game that appears in other versions in this section and website, was...
Sinusoidal To Rectangular Converter (CB13239E)
We found this circuit in a technical documentation from the 1970s. It converts low frequency...