TY - GEN
T1 - An overview of decimator structures for efficient sigma-delta converters
T2 - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
AU - Salgado, Gerardo Molina
AU - Dolecek, Gordana Jovanovic
AU - De La Rosa, Jose M.
PY - 2014
Y1 - 2014
N2 - Classical decimation structures usually use comb filters at first stage due to the simplicity of comb filters. However, comb filters cannot satisfy high performance demands of state-of-the-art Sigma-Delta (ΣΔ) analog-digital converters (ADCs). Some possible solutions are comb based structures which are power and area efficient and posses an improved magnitude characteristic. The principal issues in the comb-based filter design are: power and area efficiency, high alias rejection and approximately flat passband characteristic, considering also high values of the decimation factors. In this paper we first review the new trends in ΣΔ ADCs and demands for the decimation block design. Next we review power and area efficient structures. The methods to improve the alias rejection of comb filters, as well as the methods for the compensation for the comb passband droop, and those strategies which simultaneously improve the alias rejection and the passband droop are reviewed in the following. Finally we review the multirate decimation structures.
AB - Classical decimation structures usually use comb filters at first stage due to the simplicity of comb filters. However, comb filters cannot satisfy high performance demands of state-of-the-art Sigma-Delta (ΣΔ) analog-digital converters (ADCs). Some possible solutions are comb based structures which are power and area efficient and posses an improved magnitude characteristic. The principal issues in the comb-based filter design are: power and area efficiency, high alias rejection and approximately flat passband characteristic, considering also high values of the decimation factors. In this paper we first review the new trends in ΣΔ ADCs and demands for the decimation block design. Next we review power and area efficient structures. The methods to improve the alias rejection of comb filters, as well as the methods for the compensation for the comb passband droop, and those strategies which simultaneously improve the alias rejection and the passband droop are reviewed in the following. Finally we review the multirate decimation structures.
KW - Analog to Digital Conversion
KW - CIC structure
KW - decimation filter
KW - sigma-delta modulation
UR - https://www.scopus.com/pages/publications/84907393369
U2 - 10.1109/ISCAS.2014.6865454
DO - 10.1109/ISCAS.2014.6865454
M3 - Conference proceeding
AN - SCOPUS:84907393369
SN - 9781479934324
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1592
EP - 1595
BT - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 1 June 2014 through 5 June 2014
ER -