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標題: 低通和差調變器之設計與製作
Design and implenemtation of low-pass sigma-delta modulator
作者: 郭宗樺
關鍵字: 和差;調變器
出版社: 電機工程學系
在本論文中,我們首先探討各種類比數位轉換器的架構.我們試著簡述其基本原理,並將其優點和缺點作一整理。之後我們試著簡單的描述差和調變器的基本原理,以及差和調變器從設計到電路實現。整個超取樣差和調變器中所利用到的電路都是利用台積電 0.35um 2P4M的製程來模擬其中的電路。

Oversampling techniques based sigma-delta modulation is widely used to implement the interface between analog and digital signals in VLSI systems, such as digital audio systems. This type of systems requires a large dynamic range about 16 bits. The sigma-delta modulation approach is relatively insensitive to imperfections in circuit components and offers numerous advantages for the realization of high—resolution analog-to-digital converters (ADC).
In particular, oversampling architecture is a potentially power-efficient means of implementing high-resolution ADCs because they reduce the number and complexity of the analog circuits in comparison to Nyquist-rate converters. Furthermore, the performance requirements, and thus most of the power dissipation, are concentrated in the input stage of the converter.
In this thesis, we review the architectures of the analog-to-digital converters including Nyquist-rate and oversampling converters. The principles of the oversampling sigma-delta modulator are described. The circuit using switch-capacitor technique is simulated by switch—capacitor circuits in 0.35um TSMC 2P4M technology.
Appears in Collections:電機工程學系所

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