A reception system is proposed which is intended for receiving radio
broadcasting in the AM and FM bands having an antenna coupled to an
analog part on the input side, for receiving a complete reception band.
The system also has a frequency selection module and a digital part that
is set up to output a demodulated audio signal. The selection module
comprises, as seen in the signal flow, of a filter, an attenuation
element that can be regulated, a fixed amplifier, and a further filter.
The output side band of the analog part provides a band limited and
level-regulated signal that is sampled in an analog to digital converter
at a frequency f.sub.s so that sub-sampling is employed for direct
digitalization of the FM band. Sub-sampling is used in relationship to a
useful band, wherein this useful band lies completely in the second
Nyquist zone. Thus, in this case, f.sub.s>f.sub.max and
f.sub.s/2