This circuit that can amplify signals from 0 to 30 MHz was found in a 90s Popular Electronics. Transistors admit current equivalents. The input impedance is high.
Found in American documentation from the 1980s, this circuit prolongs the ringing of a doorbell or chime...
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...
Found in a 90s Electronic Design, this circuit operates with Maxim components of the time. The...