New structure of oversampling converters

Yie Yuan Shieu*, Chung-Yu Wu, Tsai Chung Yu, Tung Kwan Lin, Gwo Sheng Huang, Shin Shi Chang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


A novel structure of delta-sigma modulator (DSM) is proposed where a two-stage second-order loop is modified to a third-order loop by using one differentiator. The structure is simple and is shown to achieve 16-bit performance for Hi-Fi audio-band applications when the sampling rate is 3 MHz. For the applications in A/D, the sampling rate for this structure is two times of that for the double-loop DSM. For the application in D/A, the 17-bit resolution is obtained by sending the output of the differentiator back to the first stage comparator. The circuit implementation of the structure and its nonideal effect have been verified by computer simulation.

Original languageEnglish
Pages (from-to)1649-1652
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 1 Dec 1991
Event1991 IEEE International Symposium on Circuits and Systems Part 4 (of 5) - Singapore, Singapore
Duration: 11 Jun 199114 Jun 1991

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