| 摘要 |
An RF(Radio Frequency) switch is provided to block mutual interference of an air-wave signal and a cable signal to allow an analog receiver and a digital receiver to accurately tune desired signals. An RF switch includes a first amplifier(30) for amplifying an air-wave signal, a first distributor(31) for distributing the amplified air-wave signal, and first and second relay switches(32,33) for switching the distributed air-wave signal to a digital receiver or an analog receiver. The RF switch further includes a low pass filter(34) for removing noise of a cable signal received through a cable antenna, a second distributor(35) for distributing the cable signal, a second amplifier(36) for amplifying one of RF signals distributed by the second distributor, a third distributor(37) for connecting the signal amplified by the second amplifier to the first and second relay switches, and a third amplifier(38) for amplifying the other signal distributed by the second distributor.
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