This circuit was found in documentation from Analog Devices from the 90s. The circuit uses components from that time, which are not common today. It serves as a reference.
This circuit was found in an old Radio Electronics, but can still be assembled as the components are...
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
This circuit for incandescent lamps was found in an American documentation from the 80s. The...