A low-distortion and swing-suppression sigma-delta modulator with extended dynamic range
Proceedings. IEEE Asia-Pacific Conference on ASIC, - Trang 9-12
Tóm tắt
This work presents a novel low-distortion and swing-suppression second-order sigma-delta modulator with extended dynamic range. The proposed modulator is based on the dual-quantizer architecture and can effectively extend dynamic range by only adding two simple digital filters in the digital circuit. The technique for low-distortion and swing-suppression of the modulator are also proposed. Accordingly, this novel architecture can improve the circuit nonlinearity, and the in-band noise can be significantly suppressed to achieve a high resolution in mid or wide bandwidth applications.
Từ khóa
#Delta-sigma modulation #Dynamic range #Circuit topology #Wideband #Transfer functions #Bandwidth #Analog circuits #Quantization #Very large scale integration #FrequencyTài liệu tham khảo
johns, 1997, Analog Integrated Circuit Design
10.1109/ISCAS.1990.112045
10.1109/4.772407
cauwenbcrghs, 1998, Blind on-line digital calibration of multi-stage Nyquist-rate and oversampled A/D converters, Proc IEEE Int Symp Circuits Syste, 1, 508
10.1109/4.127344
10.1049/el:20010542
10.1109/9780470544358