Ladder Generator (CB9104E)

Found in General Electric documentation from the 1970s, this circuit generates a staircase signal.

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12 V to 110 V Inverter (CB19043E)
This circuit was found in an Electronics Now of 1988. The circuit is still current, and the power...
Detectophone (CB14733E)
With this name, we found this electronic stethoscope with a coal microphone in a 1957 Raytheon...
Benchtop Amplifier (CB17490E)
This transistor amplifier with complementary symmetry configuration can provide approximately 1 W...