High impedance stage (CB20564E)

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

CMOS Inverter Amplifier (CB20635E)
CMOS inverters can be used as amplifiers, obtaining a flat response up to approximately 20 kHz....
JFET Timer (CB22047E)
The maximum time interval of this circuit depends on C1. Larger values can be used to get closer to...
Audio Controlled Switch (CB21262E)
This sonic relay or vox was found in a Popular Electronics from the 90's. The power MOSFET can be of...