Title :
A new multistage bandpass sigma-delta modulator
Author :
Morche, D. ; Aubert, A. ; Andre, Elisabeth ; Balestro, F. ; Senn, P.
Author_Institution :
CNET, Meylan, France
Abstract :
A new architecture for a multistage bandpass sigma-delta modulator which tolerates imperfections in the resonator function is proposed. The architecture involves using a FIR filter to reduce the non-cancellation of the quantization noise of the first stage resulting from circuit non-idealities. Computer simulations of two differents structures illustrate the superiority of the new architecture and confirm its ability to withstand reasonable circuit non-idealities
Keywords :
FIR filters; cascade networks; modulators; sigma-delta modulation; FIR filter; circuit nonidealities; multistage bandpass type; quantization noise; resonator function imperfections; sigma-delta modulator; sixth order noise shaper; Circuit noise; Circuit simulation; Computer architecture; Delta modulation; Delta-sigma modulation; Finite impulse response filter; Frequency; Noise shaping; Sampling methods; Transfer functions;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.539796
