| CPC H04B 1/16 (2013.01) [G08B 5/36 (2013.01)] | 14 Claims |
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1. A radio frequency receiving device with automatic gain control, comprising:
a filtering module configured to filter a radio frequency signal to generate a filtered signal;
a radio frequency processing module, comprising:
an amplifier electrically connected to the filtering module and receiving the filtered signal, wherein the amplifier amplifies the filtered signal to generate a radio frequency output signal;
a detecting circuit electrically connected to the filtering module and receiving the filtered signal, wherein the detecting circuit detects the filtered signal to generate a detected signal; and
an automatic gain control circuit electrically connected to the amplifier;
a controlling unit electrically connected to the detecting circuit and the automatic gain control circuit and receiving the detected signal, wherein the controlling unit generates at least one intensity signal according to the detected signal, and judges the detected signal to generate an automatic gain control signal; and
a displaying unit electrically connected to the controlling unit and comprising a plurality of light emitters;
wherein the controlling unit transmits the automatic gain control signal to the automatic gain control circuit, so that the automatic gain control circuit controls the radio frequency output signal of the amplifier according to the automatic gain control signal;
wherein the controlling unit transmits the at least one intensity signal to the displaying unit, so that the displaying unit turns on or off the plurality of light emitters according to the at least one intensity signal.
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