Second-order Predictive ADC using a Capacitor Array DAC

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  • Yonekawa Riku
    Electrical Engineering and Electronics Course, Graduate School of Science and Engineering, Aoyama Gakuin University
  • Inagaki Yuji
    Electrical Engineering and Electronics Course, Graduate School of Science and Engineering, Aoyama Gakuin University
  • Ioka Eri
    Electrical Engineering and Electronics Course, Graduate School of Science and Engineering, Aoyama Gakuin University
  • Takase Yasuhide
    Murata Manufacturing Co., Ltd.
  • Matsuya Yasuyuki
    Electrical Engineering and Electronics Course, Graduate School of Science and Engineering, Aoyama Gakuin University

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Other Title
  • 容量アレーDACを用いた2次プレディクティブADC
  • ヨウリョウ アレー DAC オ モチイタ 2ジ プレディクティブ ADC

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Abstract

<p>The on-board microphone with MEMS technology as the condenser microphone is used widely for audio interfaces. We propose the second-order predictive ADC that converts the charge to the digital code directly, without the charge to voltage conversion circuit. In this paper, we show the performance of this ADC using the capacitor array DAC and the DEM method. By the simulation using BASIC programming language, we confirmed that the DEM method improves the SNR degradation.</p>

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