RECEIVER

摘要

A receiver in which the sneaking noise from a crystal oscillator is reduced. A high frequency amplifier circuit (11), a mixer circuit (12), a local oscillator (13), intermediate frequency filters (14, 16), an intermediate frequency amplifier (15), a limiting circuit (17), an FM detector circuit (18), a stereo demodulator 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.