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Signal strength detecting device and related method

  • US 8,121,572 B2
  • Filed: 07/23/2010
  • Issued: 02/21/2012
  • Est. Priority Date: 03/10/2010
  • Status: Active Grant
First Claim
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1. A signal strength detecting device of a communication system, the signal strength detecting device coupled to a frequency down mixer of the communication system, the frequency down mixer used for receiving and converting a first signal to a second signal whose frequencies are lower than frequencies of the first signal, the signal strength detecting device comprising:

  • a frequency up converter for receiving and converting the second signal to a third signal whose frequencies are higher than the frequencies of the second signal; and

    a detecting unit for detecting strength of the third signal and generating a signal strength indicator to the communication system according to a detecting result corresponding to the strength of the third signal, wherein the signal strength indicator represents the strength of the first signal received by the frequency down mixer.

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