×

Delta-sigma modulation analog to digital converter

  • US 5,068,659 A
  • Filed: 08/16/1990
  • Issued: 11/26/1991
  • Est. Priority Date: 03/15/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. A delta-sigma modulation analog to digital converter for converting an analog input signal to a digital output signal, comprising:

  • input means for receiving the analog input signal;

    clock generator means for generating a very high frequency clock signal with first and second phases;

    first switching circuit means, coupled to the input means, for modulating the analog input signal with the very high frequency clock signal;

    integration means, coupled to the first switching circuit means, for integrating the modulated input signal, the integration means also generating a noise signal;

    second switching circuit means, coupled to the integration means, both for demodulating the integrated modulated input signal and modulating the noise signal with the very high frequency clock signal;

    quantizer means, coupled to the second switching circuit means and responsive to the demodulated integrated modulated input signal and the modulated noise signal, for generating the digital output signal, the digital output signal including a separable portion corresponding to the modulated noise signal; and

    feedback circuit means, coupled between the quantizer means and the integration means, for both generating a feedback signal corresponding to the digital output signal and feeding the feedback signal to the integration means.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×