Second-order ΔΣAD modulator with novel feedforward architecture

• Published in: 2007 50th Midwest Symposium on Circuits and Systems pp. 148 - 151
• Main Authors: Hao San, Konagaya, H., Feng Xu, Motozawa, A., Kobayashi, H., Ando, K., Yoshida, H., Murayama, C.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.08.2007
• Subjects: Circuit noise; Circuit topology; Delta modulation; Dynamic range; Feedback; Filters; Harmonic distortion; Noise shaping; Signal resolution; Signal to noise ratio

This paper proposes novel feedforward architecture of a second-order DeltaSigmaAD modulator with single DAC- feedback topology. DeltaSigmaAD modulator realizes high resolution by oversampling and noise shaping technique. However, its SNDR (signal to noise and distortion ratio) is limited by the dyna...