DocumentCode :
408457
Title :
An adaptive digital domain calibration technique for pipelined Analog-To-Digital Converters
Author :
Hedayati, Hiva ; Kashmiri, Sayyed Mahdi ; Shoaei, Omid
Author_Institution :
Dept. of Electr. Eng., Iran Univ. of Sci. & Technol., Tehran, Iran
fYear :
2003
fDate :
9-11 Dec. 2003
Firstpage :
219
Lastpage :
222
Abstract :
An adaptive digital calibration technique for enhancing the accuracy of Pipelined Analog-to-Digital Converters (ADC) is discussed in this paper. In contrast to the traditional approach that uses ideal bit-weights for calculation of digital output, the approach adopted here is based on calculating digital output using actual bit-weights. Actual bit-weights are extracted by measuring discontinuities at points where the bit transition occurs and applying the Least Mean Square (LMS) algorithm in the sense that mean-squared error is minimized to improve the linearity of the ADC. In contrast to the traditional MDAC residue characteristics that introduce errors in both stage-gain and reference terms, the modified MDAC architecture used here has only one error term in residue characteristic. Simulation results demonstrate the extension of inherent accuracy of ADC to 16-Bits and more.
Keywords :
analogue-digital conversion; integrated circuit modelling; least mean squares methods; actual bit weights; adaptive digital domain calibration technique; least mean square algorithm; pipelined analog-digital converters; residue characteristics; Analog-digital conversion; Calibration; Capacitors; Clocks; Electronic mail; Error correction; Least squares approximation; Linearity; Pipelines; Signal resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microelectronics, 2003. ICM 2003. Proceedings of the 15th International Conference on
Print_ISBN :
977-05-2010-1
Type :
conf
DOI :
10.1109/ICM.2003.1287776
Filename :
1287776
Link To Document :
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