Title :
Dual-path delta-sigma modulators
Author :
Zhang, Zhenyong ; Steensgaard, Jesper ; Temes, Gabor C.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR
Abstract :
In this paper, we present a dual-path delta-sigma modulator (DSM) which is especially effective when a digital correlation algorithm is used to correct the DAC errors. Unlike the dynamic element matching methods, this correction algorithm is over-sampling-ratio (OSR) independent. It can accurately extract the nonlinear error of each DAC unit element, and cancel these errors in the digital domain. An efficient and economical circuit configuration of this novel structure has been found and is discussed in the paper
Keywords :
correlation methods; digital-analogue conversion; error correction; DAC nonlinear error; digital correlation; digital error correction; dual-path delta-sigma modulators; dynamic element matching; Analog-digital conversion; Circuits; Computer errors; Delta modulation; Digital modulation; Error correction; Quantization; Signal processing; Signal processing algorithms; Wideband;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594197
