Title :
Leaky quantization noise reduction for cascaded sigma-delta modulators using H-infinity control
Author :
Lin, Chun-Chen ; Chou, Yung-Shan ; Chen, Hsin-Liang ; Chiang, Jen-Shiun
Author_Institution :
Dept. of Electr. Eng., Tamkang Univ., Taipei, Taiwan
Abstract :
In this paper, a digital calibration method based on the H-infinity control approach is proposed for reducing the impact of the leakage of unshaped quantization noise from the first stage of the cascaded SDM due to the imperfect analog circuit. Simulation results show that the modulator with the proposed filter has the better signal-to-noise ratio performance than the conventional counterpart.
Keywords :
H∞ control; calibration; cascade control; quantisation (signal); sigma-delta modulation; transfer functions; H-infinity control; cascaded sigma-delta modulators; digital calibration method; imperfect analog circuit; signal-to-noise ratio performance; unshaped quantization noise reduction; Analog circuits; Calibration; Circuit noise; Circuit simulation; Delta-sigma modulation; Filters; H infinity control; Noise reduction; Quantization; Signal to noise ratio;
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-7771-5
DOI :
10.1109/MWSCAS.2010.5548871
