Title :
A method for linearization of a multibit delta-sigma (ΔΣ) A/D converter
Author :
Knudsen, Niels O.
Author_Institution :
Nat. Instrum., Austin, TX, USA
Abstract :
Multibit delta-sigma ADCs, when compared to single-bit delta-sigma converters, have the potential to achieve larger dynamic ranges and higher sampling rates. However, because multibit converters are sensitive to nonlinearity in the internal converter in the modulator, this potential is rarely exploited. This nonlinearity can be compensated for digitally by correcting the output codes from the converter, provided you can model the erroneous behavior of the modulator. This paper presents a new method for characterizing nonlinearities within a multibit delta-sigma ADC. The method is suitable for self-calibration
Keywords :
analogue-digital conversion; compensation; delta-sigma modulation; linearisation techniques; delta-sigma A/D converter; digital compensation; dynamic range; internal convertor nonlinearity; linearization method; modulator; multibit ΔΣ A/D converter; multibit delta-sigma ADC; sampling rates; self-calibration; Circuit noise; Digital modulation; Filters; Frequency; Linearity; Low-frequency noise; Noise shaping; Quantization; Servomechanisms; Transfer functions;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.776099
