| A Wideband Cascaded Sigma-Delta Modulator with Improved Non-linearity Effects | |
|---|---|
| 學年 | 92 |
| 學期 | 1 |
| 出版（發表）日期 | 2003-08-01 |
| 作品名稱 | A Wideband Cascaded Sigma-Delta Modulator with Improved Non-linearity Effects |
| 作品名稱（其他語言） | |
| 著者 | 江正雄; Chiang, Jen-shiun; Chou, Pao-chu; Chang, Teng-hung |
| 單位 | 淡江大學電機工程學系 |
| 出版者 | |
| 著錄名稱、卷期、頁數 | International Journal of Electronics 90(4), pp.255-275 |
| 摘要 | This work presents a wideband cascaded sigma-delta modulator (CLFSDM) that reduces the nonlinearity effects of components. This architecture offers a new noise-shaping function to achieve high resolution in wideband applications and reduce digital-analogue converter (DAC) mismatch from the multi-bit feedback. Moreover, the error cancellation schemes can be added in the digital circuit part to cancel the coarse quantization errors and thus effectively reduce the non-ideal effects such as DAC mismatch. The mismatches between the two stages, such as in the gain error and pole error, may seriously degrade performance. The blind on-line calibration technique is used to eliminate these imperfect analogue circuit errors in the digital circuit. Accordingly, this architecture can reduce the over sampling ratio (OSR), and the in-band noise can be significantly suppressed to achieve a high resolution in Matlab and Switcap2 simulations. Simulation results indicate this sigma-delta modulator is very efficient in wide bandwidth applications. |
| 關鍵字 | |
| 語言 | en |
| ISSN | |
| 期刊性質 | 國內 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/60821 ) |
| SDGS | 永續城市與社區,負責任的消費與生產,夥伴關係,優質教育,尊嚴就業與經濟發展,產業創新與基礎設施 |
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