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A time-delay jitter-insensitive continuous-time bandpass ΔΣ modulator architecture

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4 Author(s)
Pulincherry, A. ; Qualcomm Inc., San Diego, CA, USA ; Hufford, M. ; Naviasky, E. ; Un-Ku Moon

In this paper, we present a new continuous-time bandpass delta-sigma (ΔΣ) modulator architecture with mixer inside the feedback loop. The proposed bandpass ΔΣ modulator is insensitive to time-delay jitter in the digital-to-analog conversion feedback pulse, unlike conventional continuous-time bandpass ΔΣ modulators. The sampling frequency of the proposed ΔΣ modulator can be less than the center frequency of the input narrow-band signal.

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:52 ,  Issue: 10 )