A receiver in which the sneaking noise from a crystal oscillator is
reduced. A high-frequency amplifier circuit 11, a mixing circuit 12, a
local oscillator 13, intermediate-frequency filters 14 and 16, an
intermediate-frequency amplifier circuit 15, a limit circuit 17, an FM
detection circuit 18, and a stereo demodulation circuit 19, an oscillator
20, and a PLL circuit 21 all constituting an FM receiver are provided as
a one-chip component 10. A crystal oscillator 31 as an external component
is connected to the oscillator 20. The natural-oscillation frequency of
the crystal oscillator 31 is so set that the fundamental component and
its harmonics are out of the reception band.