2nd order and higher order modulator Delta-sigma modulation

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fig. 4: block diagram of 2nd order ΔΣ modulator


the number of integrators, , consequently, numbers of feedback loops, indicates order of ΔΣ-modulator; 2nd order ΔΣ modulator shown in fig. 4. first order modulators unconditionally stable, stability analysis must performed higher order modulators.







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