Driver Darlington (CB8957E)

This circuit was obtained in a 1960 documentation of General Electric. It is applied in the control of registers of the time.

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Audio stage for radios (CB20511E)
This circuit for experimental radios and other applications is from a documentation from the 50's....
Magnetic capsule preamplifier (CB7102E)
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...
20 Hz High Pass Filter with the 741 (CB9415E)
This 20 Hz high-pass filter was obtained in a 1965 American publication. The operational amplifier must...