教師資料查詢 | 類別: 期刊論文 | 教師: 周永山 Chou Yung-shan (瀏覽個人網頁)

標題:Heuristic finite-impulse-response filter design for cascaded ΣΔ modulators with finite amplifier gain
學年100
學期2
出版(發表)日期2012/07/01
作品名稱Heuristic finite-impulse-response filter design for cascaded ΣΔ modulators with finite amplifier gain
作品名稱(其他語言)
著者Chou, Yung-Shan; Lin, Chun-Chen; Chen, Hsin-Liang; Chiang, Jen-Shiung
單位電機工程學系暨研究所
出版者Stevenage: The Institution of Engineering and Technology
著錄名稱、卷期、頁數IET Circuits, Devices & Systems, 6(4), pp.235-245
摘要This study addresses a new digital calibration filter design for cascaded ΣΔ modulators with finite amplifier gain. A recent approach based on the H-infinity loop shaping method to this problem has the merit of obviating the use of an estimation or adaptive digital correction scheme, which thus reduces the complexity of circuit implementation. For the approach to be successful, it is critical to find an appropriate weighting function so as to make the gain responses of the uncertain noise transfer function (NTF) in a proper shape for improving signal-to-noise ratio (SNR). However, the search of such a weighting function is difficult in general. Moreover, the introduced weighting function increases filter order and hence circuit complexity. To circumvent this difficulty and the inherited drawbacks, this study presents a new noise shaping method for the problem. Considering that it is hard to decide the optimal shape of the uncertain NTF a priori, the authors propose a dual-band design to achieve the shape adjustment task. In particular, the range of lower frequency band is determined by SNR performance evaluation rather than being arbitrarily given a priori. This step is crucial and increases the chance of finding a better filter.
關鍵字
語言英文
ISSN1751-858X
期刊性質國外
收錄於SCI;EI;
產學合作
通訊作者Chou, Yung-Shan
審稿制度
國別英國
公開徵稿
出版型式,電子版,紙本
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