PURPOSE: To provide a demodulating circuit for receiving a satellite broadcasting with superior mass-productivity by devising the circuit so as to adjust the oscillation frequency of a voltage control oscillator by means of a variable capacitor.

CONSTITUTION: In a PLL system FM demodulating circuit for receiving satellite broadcasting, the oscillation frequency of the voltage control oscillator 6 is made to be adjusted by the variable capacitor 48 connected to air core coils 43, 45 and 46 in parallel, which constitute a resonance circuit. Thus, the operation point of a DC amplifier 3, etc., is set to the center of a dynamic range so that the demodulating circuit for receiving satellite broadcasting where a demodulating characteristic is kept satisfactory even in IC where a power source voltage is decreased and the adjustment of AFC with high precision is secured in addition is obtained.