Title :
Layout considerations for ΣΔ modulators using data weighted averaging
Author :
Mehrabi, Arash ; Oliaei, Omid
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Massachusetts Amherst, Amherst, MA
Abstract :
We present an empirical study of the gradient and distance-dependent component mismatch effects in multi-bit SigmaDelta modulators. We provide suitable layout and addressing strategies that significantly improve the SFDR and SNDR of the modulator through reducing the INL of the feedback DAC. These techniques combined with the well-known dynamic element matching techniques, commonly used for oversampling data converters, enable us to address the mismatch and gradient issues for data converters.
Keywords :
modulators; INL reduction; SFDR; SNDR; data converters; data weighted averaging; distance-dependent component mismatch effects; dynamic element matching; feedback DAC; gradient component mismatch effects; multibit SigmaDelta modulators; Analog-digital conversion; Degradation; Energy consumption; Feedback; Filtering; Linearity; Performance analysis; Random number generation; Semiconductor device modeling; Temperature;
Conference_Titel :
Circuits and Systems, 2007. NEWCAS 2007. IEEE Northeast Workshop on
Conference_Location :
Montreal, Que
Print_ISBN :
978-1-4244-1163-4
Electronic_ISBN :
978-1-4244-1164-1
DOI :
10.1109/NEWCAS.2007.4488003
