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Digital feedforward sigma-delta modulator in analog-to-digital converter and modulation method thereof

  • US 8,120,518 B2
  • Filed: 06/14/2010
  • Issued: 02/21/2012
  • Est. Priority Date: 06/14/2010
  • Status: Active Grant
First Claim
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1. A digital feedforward sigma-delta modulator (SDM) for performing digital feedforward sigma-delta modulation on an analog input signal and outputting a corresponding digital output signal, the modulator comprising:

  • a plurality of integrators connected in series, receiving an analog signal, integrating the received analog signal and outputting a corresponding analog signal, respectively;

    a plurality of multipliers weighting the analog signals outputted from the plurality of integrators and outputting the weighted analog signals, respectively;

    a plurality of quantizers performing quantization on the analog signals outputted from the plurality of multipliers and outputting a digital signals, respectively; and

    a digital adder adding up the digital signals outputted from the plurality of quantizers and outputting a corresponding digital output signal.

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