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In this paper the quantization noise in the non-feedback Delta-Sigma modulator with DC-input is analysed. Since no global feedback is present in the modulator the quantization-noise will not be fed back to input of the quantizer which simplifies the analysis compared to the case of a conventional modulator By defining a proper quantization function which is equivalent to the ideal uniform quantizer for restricted input values, the quantization error may be analysed using established methods for a simple memoryless quantizer The non-feedback modulator is modeled in Matlab, and the simulated results fits well with the proposed analytic model.
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on (Volume:1 )
Date of Conference: 25-28 May 2003