High impedance stage (CB20564E)

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

Touch Action Switch (II) (CB146)
The very high-input impedance of the CMOS gate allows this kind of device to be used as a...
3-tone Unjunction Oscillator (CB3849E)
Depending on the key pressed, this oscillator produces a different tone, set in the corresponding...
PWM amplifier (Class D) (CB992E)
We published this circuit in a magazine of the 90s, but it is still present by the components it...