| 摘要 |
A digital tuner is provided to prevent interference in an MOPLL IC by constantly adjusting the gain of a booster through a variable controller when a high frequency signal is strong. A digital tuner includes a booster(11), an MOPLL(Mixer Oscillator Phase Locked Loop) IC(Integrated Circuit)(13), and a variable controller(17). The booster amplifies a high frequency signal received from an antenna and outputs the amplified signal. The MOPLL IC detects the level of the high frequency signal based on the inputted high frequency signal. The variable controller adjusts gain of the booster according to the level of the high frequency signal detected in the MOPLL IC. |
