An all-digital ΔΣ envelope modulator for EER-based transmitters based on CMOS standard cell design

Chien-Hung Kuo*, Shu Li Liao

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

摘要

This paper presents an all-digital 4-bit delta-sigma (ΔΣ) modulator for envelope elimination and restoration (EER)-based polar transmitters. A fast feedback approach is devised by combining the digital truncator with path gains to reduce the propagation delay of feedback loops in modulators. The CMOS standard cell-based design could hence be utilized to implement the proposed modulator at a sampling frequency of 182 MHz. The noise transfer function of the presented ΔΣ modulator has been optimized to obtain a maximally flat noise band to easily meet the EDGE spectrum mask. Experiment results show the presented ΔΣ modulator has the noise power beneath -60 dB below the full-scale EDGE signal within ±20 MHz of the carrier frequency. The measured adjacent channel power ratios and alternate channel power ratio of the proposed modulator also give a 6 dB margin to the EDGE specification at 400 kHz and 600 kHz offsets.

原文英語
主出版物標題2011 IEEE 9th International New Circuits and Systems Conference, NEWCAS 2011
頁面325-328
頁數4
DOIs
出版狀態已發佈 - 2011 九月 13
事件2011 IEEE 9th International New Circuits and Systems Conference, NEWCAS 2011 - Bordeaux, 法国
持續時間: 2011 六月 262011 六月 29

出版系列

名字2011 IEEE 9th International New Circuits and Systems Conference, NEWCAS 2011

其他

其他2011 IEEE 9th International New Circuits and Systems Conference, NEWCAS 2011
國家/地區法国
城市Bordeaux
期間2011/06/262011/06/29

ASJC Scopus subject areas

  • 硬體和架構
  • 電氣與電子工程

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