DocumentCode :
3332959
Title :
A multi-bit Sigma-Delta modulator using ratio-independent feedback DAC
Author :
Song, Yu ; Moule, Eric C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Rochester, Rochester, NY, USA
fYear :
2009
fDate :
2-5 Aug. 2009
Firstpage :
389
Lastpage :
392
Abstract :
A 3-bit 3rd-order Sigma-Delta modulator employing a switched-capacitor multiply-by-N DAC is described in this paper. The DAC is implemented in a capacitor mismatch independent way to improve circuit linearity. Theoretical analysis on the effect of finite op amp DC gain on DAC linearity is given. A prototype Sigma-Delta modulator for verification purpose was built with discrete components on printed circuit boards. Experimental results and timing, area, power considerations are addressed.
Keywords :
circuit feedback; modulators; operational amplifiers; printed circuits; sigma-delta modulation; switched capacitor networks; DAC linearity; finite op amp gain; multibit sigma-delta modulator; printed circuit board; ratio-independent feedback DAC; switched-capacitor DAC; Analog-digital conversion; Calibration; Circuits; Delta-sigma modulation; Feedback; Linearity; Operational amplifiers; Prototypes; Virtual colonoscopy; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on
Conference_Location :
Cancun
ISSN :
1548-3746
Print_ISBN :
978-1-4244-4479-3
Electronic_ISBN :
1548-3746
Type :
conf
DOI :
10.1109/MWSCAS.2009.5236072
Filename :
5236072
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=3332959
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