Perforated tape reader (CB7417E)

Found in General Electric documentation from the 1980s, this high speed perforated tape reader circuit has a maximum speed of 2000 bits per second.

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Tunnel Diode Voltage Regulator (CB12876E)
This circuit from an old Argentine publication shows how it is possible to use a tunnel diode in a...
1 kHz tone filter (CB7583E)
Found in documentation from the 90's, this circuit has a narrow pass band around 1 kHz. The...
100 000 Mohm Step for Multimeter (CB12282E)
With this circuit it is possible to obtain an input resistance of 100Gohms for a multimeter, with...