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Analog-to-Digital Converter, Signal Processor, and Method for Analog-to-Digital Conversion

  • US 20130194114A1
  • Filed: 01/31/2012
  • Published: 08/01/2013
  • Est. Priority Date: 01/31/2012
  • Status: Active Grant
First Claim
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1. An analog-to-digital converter for converting an input signal, the analog-to-digital converter comprising:

  • a sigma-delta modulator configured to receive an analog modulator input signal and provide a digital modulator output signal; and

    an interference cancellation loop, comprising;

    a digital filter configured to amplify the digital modulator output signal in a frequency band, attenuate the digital modulator output signal outside the frequency band and a transition band surrounding the frequency band, and provide a filtered digital feedback signal;

    a digital-to-analog converter configured to convert the filtered digital feedback signal to a cancellation signal; and

    a signal combiner configured to combine the analog modulator input signal with the cancellation signal resulting in the analog modulator input signal, in order to at least partially cancel interference signal portions within the analog modulator input signal.

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