A novel third order Delta Sigma Modulator with one opamp shared among three integrator stages

[摘要] References(5)Cited-By(4)A novel third order delta sigma modulator (DSM) is presented. The third order loop filter in the proposed DSM shares one opamp among three integrator stages through an optimal operation timing, which makes use of load capacitance differences between integrator stages. The power dissipation of the proposed DSM is much lower than conventional third order DSM because power consuming blocks in the DSM are only one opamp and a comparator. The proposed DSM, designed on 0.35µm CMOS process under 3.3V supply achieves 1mW power dissipation with 100-11kHz band width and 96dB SQNR.

[学科分类] 电子、光学、磁材料

[关键词] amplifier sharing technique;delta sigma modulator;low power consumption