Quadrature detector (CB9410E)

We found this circuit in General Electric's documentation from 1968. The integrated circuit is from that time, uncommon today.

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Boat or car flasher (CB9779E)
This SCR circuit, which can also be used for signaling places, was found in old American...
Thermostatic control with mercury sensor (CB21388E)
This former temperature sensor with a mercury sensor was found in a General Electric documentation from...
Voltage Regulator (CB14119E)
We found this parallel regulator in a 1973 publication. Transistors admit equivalents and the...