Architectural Design and Simulation of a Fourth-Order Sigma-Delta Modulator

Wen Jie Fan; Qiu Ye Lv; Chong He; Liang Yin; Xiao Wei Liu

doi:10.4028/www.scientific.net/KEM.609-610.723

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 609-610Architectural Design and Simulation of a...

Architectural Design and Simulation of a Fourth-Order Sigma-Delta Modulator

Abstract:

Sigma-delta ADC outperforms the Nyquist ADC in precision and robustness by using oversampling and noise shaping. A fourth-order sigma-delta modulator of input feedforward architecture is designed and simulated in system-level. Input feedforward architecture has advantages of low output swing of integrators and simple structure. Proper circuit parameters are also presented in this paper. The simulation revealed that the modulator achieves 109 dB dynamic range in a signal bandwidth of 1 KHz with a sampling frequency of 250 KHz.

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Periodical:

Key Engineering Materials (Volumes 609-610)

Pages:

723-727

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.609-610.723

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Online since:

April 2014

Authors:

Wen Jie Fan*, Qiu Ye Lv, Chong He, Liang Yin, Xiao Wei Liu

Keywords:

Architectural Design, Input Feed- Forward Architecture, Noise Shaping, Oversampling, Sigma-Delta Modulator

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