This circuit was found in a Motorola documentation from the 90s. The transistor used is uncommon today. The output power is 1 W.
This circuit simulates an inductor. Or operational amplifier of old type, but a configuration is...
We found this circuit in a 1967 Electronic Design. The circuit uses contemporary transistors that...
To control relays safely with double insulation, we suggest the circuit in the figure. The optical...