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dc.contributor.authorChang, THen_US
dc.contributor.authorDung, LRen_US
dc.contributor.authorGuo, JYen_US
dc.date.accessioned2014-12-08T15:25:23Z-
dc.date.available2014-12-08T15:25:23Z-
dc.date.issued2005en_US
dc.identifier.isbn0-7803-8834-8en_US
dc.identifier.issn0271-4302en_US
dc.identifier.urihttp://hdl.handle.net/11536/17769-
dc.description.abstractThis paper presents an improved architecture of the multistage (MASH) multibit sigma-delta modulators (Sigma Delta Ms). The architecture can be immune to circuit nonidealities over a large portion of input range when oversampling ratio (OSR) is low, and hence the dynamic range (DR) can be improved. Our approach is based on two resonator topologies, high-Q cascade-of-resonator-with-feedforward (HQCRFF) and low-Q cascade-of-integrator-with-feedforward (LQCIFF). The key to improving DR is to use HQCRFF-based single-bit structure in the first stage and have the first stage oscillated. When the first stage oscillates, the coarse quantization noise vanishes and hence circuit nonidealities, such as finite op-amp gain and capacitor mismatching, do not cause leakage quantization noise problem. In addition, because of the in-band zeros introduced by the resonators, the proposed architecture enhances the suppression of the in-band quantization noise for wideband applications. As the results of simulation, the proposed MASH architecture can inherently have wide DR without using additional calibration techniques.en_US
dc.language.isoen_USen_US
dc.titleOn reducing leakage quantization noise of multistage Sigma Delta modulator using nonlinear oscillationen_US
dc.typeProceedings Paperen_US
dc.identifier.journal2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGSen_US
dc.citation.spage2555en_US
dc.citation.epage2558en_US
dc.contributor.department電控工程研究所zh_TW
dc.contributor.departmentInstitute of Electrical and Control Engineeringen_US
dc.identifier.wosnumberWOS:000232002402162-
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