An AM receiving circuit is disclosed which comprises an intermediate
frequency amplifying unit that generates an intermediate frequency signal
from a broadcast wave signal received by an antenna to amplify and output
the intermediate frequency signal; an AGC (Automatic Gain Control) unit
that sets gain of the intermediate frequency amplifying unit depending on
electric field intensity of the broadcast wave signal; and an AM
detecting unit that detects the intermediate frequency signal output from
the intermediate frequency amplifying unit, wherein the AM receiving
circuit comprises a sound quality compensating unit including: a filter
unit that extracts a predetermined frequency band of the audio signal; an
amplifying unit that boosts or attenuates the audio signal in the
predetermined frequency band extracted from the filter unit; and a
controlling unit that controls filter characteristics of the filter unit
and sets a boosting function or an attenuating function of the amplifying
unit, depending on the electric field intensity of the broadcast wave
signal.