Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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The Design of Sigma-Delta Modulator for audio signal application

음성신호 처리용 저주파 시그마 델타 변조기 설계

  • 신경민 (성균관대학교 전기전자 및 컴퓨터공학과) ;
  • 장흥석 (성균관대학교 전기전자 및 컴퓨터공학과) ;
  • 정대영 (성균관대학교 전기전자 및 컴퓨터공학과) ;
  • 정강민 (성균관대학교 전기전자 및 컴퓨터공학과)
  • Published : 2000.11.01
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Abstract

Oversampling modulators based on high-order sigma-delta modulation provide an effective means of achieving high-resolution A/D conversion in a VLSI technology. Because high-order noise shaping great]y reduces the quantization noise in the signal band. This paper introduces a third-order cascaded sigma-delta modulator that is stable for large input level. Modulator was simulated 3.3V single power supply voltage in 0.65$\mu\textrm{m}$ CMOS technology. It achieves 80㏈ SNR for a 20㎑ input signal bandwidth. A lock frequency is 3㎒ that is 80 oversampling ratio.

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