A 90-dB SNR 2.5-MHz output-rate ADC using cascaded multibit delta-sigma modulation at 8× oversampling ratio. - Ichiro Fujimori; Lorenzo Longo; Armond Hairapetian; Kazushi Seiyama; Steve Kosic; Jun Cao 001; Shu-Lap Chan (IEEE J. Solid State Circuits, 2000)