| 摘要 |
PURPOSE: A tuner module is provided to feed back detection signals in a demodulation unit to a radio frequency(RF) amplification circuit unit, thereby solving an adjacent and jamming interference problem. CONSTITUTION: An RF amplification circuit unit(210) amplifies received signals. An intermediate frequency(IF) circuit unit(220) synchronizes the amplified signals to intermediate frequency signals A surface acoustic wave(SAW) filter unit(230) filters only band of specific broadcasting frequency signals from the intermediate frequency signals. A demodulation unit(240) demodulates the filtered broadcasting frequency signals. An IF matching unit(250) controls IF matching between the intermediate frequency circuit unit and the SAW filter unit. [Reference numerals] (201) IF filter; (202) ANT tuning circuit unit; (204) RF tuning circuit unit; (210) RF amplification circuit unit; (225) IF tuning circuit unit; (240) Analog/digital demodulation unit
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