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NTF zero compensation technique for passive sigma-delta modulator
Hussain A.2; Sin S.-W.2; Seng-Pan U.2; Martins R.P.1,2
2011-12-05
Conference Name2011 Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics
Source PublicationAsia Pacific Conference on Postgraduate Research in Microelectronics and Electronics
Pages82-85
Conference Date6-7 Oct. 2011
Conference PlaceMacau, China
Abstract

A novel technique is proposed to compensate zeroes of Noise Transfer Function (NTF) for single loop low pass passive switched capacitor sigma-delta modulator (PSDM). PSDM uses switched capacitor (SC) integrator as a loop filter. Poles of loop filter are zeroes of NTF. The proposed technique for SC integrator shifts the poles of SC integrator from inside the unit circle to z=1 at DC. As a result zeroes of NTF for PSDM also get modified and shifts, which greatly improves the noise suppression and noise-shaping performance. Simulation results in simulink, shows that the technique of proposed SC integrator for 2 Order PSDM with 4-bit quantizer having oversampling ratio (OSR) = 32 improves 18dB SNDR over traditional SC integrator. © 2011 IEEE.

DOIhttp://doi.org/10.1109/PrimeAsia.2011.6075076
URLView the original
Language英语
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Document TypeConference paper
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Faculty of Science and Technology
Affiliation1.Instituto Superior Técnico
2.Universidade de Macau
Recommended Citation
GB/T 7714
Hussain A.,Sin S.-W.,Seng-Pan U.,et al. NTF zero compensation technique for passive sigma-delta modulator[C],2011:82-85.
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