Title :
Continuous Time Cascade Sigma Delta Modulator without digital cancellation filters
Author :
Patón, S. ; Torreno, J.A. ; Prefasi, E. ; Hernández, L.
Author_Institution :
Carlos III Univ. of Madrid, Leganes, Spain
fDate :
May 30 2010-June 2 2010
Abstract :
This work presents a design procedure for Continuous Time (CT) Cascade Sigma Delta Modulators (SDMs) using the Sturdy approach for Discrete Time Modulators, where the usual Digital Cancellation Filters are removed. The error cancellation mechanism is affected by excess loop delay in the CT approach. Special design considerations are derived and a specific design methodology is proposed. A 10-MHz bandwidth and 80-dB peak SNR example is designed and simulated using a 2-1 topology.
Keywords :
sigma-delta modulation; CT cascade SDM; Sturdy approach; bandwidth 10 MHz; continuous time cascade sigma delta modulator; digital cancellation filters; discrete time modulators; error cancellation mechanism; loop delay; Bandwidth; Delay; Delta modulation; Delta-sigma modulation; Design methodology; Digital filters; Digital modulation; Energy consumption; Quantization; Topology;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537655
