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.

2006 49th Midwest Symposium on Circuits and Systems, MWSCAS'06
Department of Electronics

Kuang, W.V. (Wensheng V.), & Wight, J. S. (2006). A novel biquad filter circuit for continuous-time sigma-delta modulators. In Midwest Symposium on Circuits and Systems (pp. 119–122). doi:10.1109/MWSCAS.2006.382010