Lambda Diode (CB19852E)

This configuration elaborated with common junction FETs has a characteristic like that of tunnel diodes and can operate at very high frequencies.

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Noise Generator with the 741 (CB12176E)
This traditional configuration of a white noise generator that uses the junction of a transistor with a...
Code Switch (CB6536E)
We found this circuit in a Popular Electronics of the 80s. Used integrated circuits are uncommon...
High impedance stage (CB20564E)
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...