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

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.