A novel biquad circuit is presented that allows the loop filter of a high-order continuous-time sigma-delta modulator to be implemented by cascading low-order biquad sections, considerably easing the design and implementation of the high-order continuous-time sigma-delta modulator. Experiment on a 4th-order bandpass continuous-time sigma-delta modulator is conducted successfully and the results are presented.

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Persistent URL dx.doi.org/10.1109/VTCF.2006.599
Conference 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Kuang, W.V. (Wensheng V.), & Wight, J. S. (2006). A novel biquad filter circuit for continuous-time sigma-delta modulators. In IEEE Vehicular Technology Conference (pp. 2916–2919). doi:10.1109/VTCF.2006.599