Noise-Coupled ΔΣAD Modulator with Shared OP-Amp
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概要
- 論文の詳細を見る
This paper proposes an improved architecture of the noise-coupled ΔΣAD modulator with OP-Amp sharing technique. The noise-coupled ΔΣAD modulator enhances the order of noise-shaping efficiently by adding some passive capacitors and switches. However, in a conventional noise-coupled ΔΣAD modulator with feedforward path, an analog adder is needed before the quantizer, and especially in a multibit modulator, an additional amplifier is necessary to realize the summation of feedforward signals and coupled quantization noise, which leads to extra chip area and power dissipation. In this paper, we propose a novel architecture of the noise-coupled ΔΣAD modulator with OP-Amp sharing technique, which realizes the summation of feedforward signals and coupled quantization noise without an additional amplifier. The proposed architecture is functionally equivalent to the conventional noise-coupled modulator with smaller chip area and low power dissipation. We have performed simulation with MATLAB and SPICE to verify the effectiveness of the proposed architecture and modulator circuits. The simulation results show that the proposed modulator can realize the noise-shaping enhancement effectually as the same as the conventional noise-coupled modulator with small overhead.
- 2009-12-01
著者
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SAN Hao
Department of Information Network Engineering, Tokyo City University
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KONAGAYA Hajime
Department of Electronic Engineering, Graduate School of Engineering, Gunma University
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YAMADA Takafumi
Department of Electronic Engineering, Graduate School of Engineering, Gunma University
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LIN Haijun
Department of Electronic Engineering, Graduate School of Engineering, Gunma University
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KOBAYASHI Haruo
Department of Electronic Engineering, Graduate School of Engineering, Gunma University
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ANDO Kazumasa
Toshiba Microelectronics Corporation
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MURAYAMA Chieto
Toshiba Microelectronics Corporation
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San Hao
Dep. Of Information Network Engineering Tokyo City Univ.
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San Hao
Department Of Electronic Engineering Faculty Of Engineering Gunma University
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Lin Haijun
Department Of Electronic Engineering Graduate School Of Engineering Gunma University
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Konagaya Hajime
Department Of Electronic Engineering Graduate School Of Engineering Gunma University
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Yamada Takafumi
Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of
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Yamada Takafumi
Department Of Electronic Engineering Graduate School Of Engineering Gunma University
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Kobayashi Haruo
Department Of Electronic Engineering Faculty Of Engineering Gunma University
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San Hao
Tokyo City Univ. Tokyo Jpn
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Kobayashi Haruo
Gunma Univ. Kiryu‐shi Jpn
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KOBAYASHI HARUO
Department of Animal Breeding, Faculty of Agriculture, University of Tokyo
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