High impedance stage (CB20564E)

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

Logic Probe (CB4720E)
This circuit can be used with TTL or CMOS circuits with slightly higher voltage supply. The...
100 Hz Fourth Order High Pass Filter (CB25819E)
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...
Tuning Indicator (CB1468E)
This circuit was obtained in 1974. It serves to indicate the tuning of stations on a common...