New 2-2 Sigma-Delta Modulators for Different Applications
Slim Tahri1, Nizar Khitouni2, Med Slim Bouhlel3

1Slim Tahri, SETIT, Institute of Biotechnology of Sfax, University of Sfax Tunisia.
2Nizar Khitouni*, SETIT, Institute of Biotechnology of Sfax, University of Sfax Tunisia. 
3Med Salim Bouhlel, SETIT Institute of Biotechnology of Sfax, University of Sfax Tunisia. 
Manuscript received on November 20, 2021. | Revised Manuscript received on November 29, 2021. | Manuscript published on November 30, 2021. | PP: 269-272 | Volume-10 Issue-4, November 2021. | Retrieval Number: 100.1/ijrte.D66291110421 | DOI: 10.35940/ijrte.D6629.1110421
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Abstract: This work presents the design of a new 2-2 programmable sigma delta modulator architecture, for different applications, this transformation design of the ΣΔ 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. 
Keywords: Signal processing, Sigma delta, MASH, Low pass, band pass, high pass, Biomedical, EMG, ECG, EEG, RF.