Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is short range, but a power amplifier stage can be used.
This filter has a regulated source configuration. It can be implemented with almost any...
We found this filter configuration in an old documentation. It is one of many possible ones that...
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...