High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Word Filter (CB13612E)
This filter, from an audio publication from 1977, passes the frequency range corresponding to the...
Voltage Doubler (CB20196E)
In the figure we have three voltage doubler configurations that can be used in high and low...
Ring Counter using Lamps (CB6599E)
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...