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Subsampling RF receiver architecture

  • US 20020181614A1
  • Filed: 03/19/2002
  • Published: 12/05/2002
  • Est. Priority Date: 04/09/2001
  • Status: Active Grant
First Claim
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1. A subsampling receiver, comprising:

  • a first bandpass filter coupled to receive a modulated signal, the modulated signal including at least one carrier signal at radio frequencies, modulated by a payload signal having frequencies significantly lower than the carrier signal and within a first bandwidth, the first bandpass filter passing frequencies within a frequency band at least as wide as the first bandwidth in a range including the at least one carrier signal;

    a first sample and hold circuit, having an input coupled to the first bandpass filter, for sampling the modulated signal at a sampling frequency substantially lower than the frequency of the at least one carrier signal; and

    a first analog to digital converter, coupled to the first sample and hold circuit, for digitizing the sampled modulated signal to produce a digital signal at a baseband frequency and corresponding to the payload signal.

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