The circuit below is suggested by National Semiconductor in technical documentation on the LM3909. The circuit is powered by a single battery and has a very low consumption.
This 5-transistor receiver for the medium wave range was described in an article in Radio...
This circuit is from an American publication from 1978 and can currently be assembled with minor...
Although ECL logic is rare (no longer used), this circuit from a 1992 documentation shows how to...