| 摘要 |
A digital tuner is provided to amplify the power of the tuner and deliver the power to an analog or digital broadcast receiver, thereby removing a driving power source. A digital tuner includes an intermediate frequency circuit(21), an analog broadcast receiving module(22), a switch, a digital broadcasting receiving module(23), a general purpose interface bus and an amplifier. The intermediate frequency circuit(21) tunes a high frequency signal into an intermediate frequency circuit. The analog broadcast receiving module(22) demodulates the intermediate frequency signal into analog voice and image signals. The switch selects the driving of an analog broadcasting receiving module or the driving of a digital broadcasting receiving module. The general purpose interface bus is used for an MOPLL IC. The amplifier amplifies the voltage of the bus of the MOPLL IC.
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