High impedance stage (CB20564E)

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

SCR Delay Circuit (CB14713E)
With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can...
Stepper Motor Control (CB21247E)
Found in an Electronic Design from the 90's, this circuit generates signals for stepper motor...
Tunnel Diode Oscillaor (CB4602E)
The circuit shown in the figure can generate signals up to 1.6 GHz. Coil L1 and capacitor C2 are...