Journal article Open Access

New 2-2 Sigma-Delta Modulators for Different Applications

Slim Tahri; Nizar Khitouni; Med Slim Bouhlel


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    <subfield code="a">Signal processing, Sigma delta, MASH, Low pass, band pass, high pass, Biomedical, EMG, ECG, EEG, RF.</subfield>
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    <subfield code="p">International Journal of Recent Technology and Engineering (IJRTE)</subfield>
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    <subfield code="a">&lt;p&gt;This work presents the design of a new 2-2 programmable sigma delta modulator architecture, for different applications, this transformation design of the &amp;Sigma;&amp;Delta; modulator low-pass, band-pass and high-pass or vice versa with loopbacks addition, which improved the linearity of the converter and reduced the quantization noise. In this work, the MASH structure enables the implementation of stable and high-order modulator. This makes low voltage and low power applications ideal. The simulation result for sigma delta modulator for biomedical applications exhibit a signal to noise ratio is 95 dB @ 250Hz bandwidth and a 75dB @ 200KHz ,85dB @1MHz for pass band modulator. The SNR is about 70dB for 5MHz bandwidth and for high pass application. This tool will allow a development contribution and characterize a system optimization set from the start while remaining at a high level of design that is suitable for electronic systems and models VHDL-AMS, RF, Biomedical.&lt;/p&gt;</subfield>
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