Title :
Architectures for high-order multibit Σδ modulators
Author :
Walden, R.H. ; Cataltepe, T. ; Temes, G.C.
Author_Institution :
Hughes Res. Lab., Malibu, CA, USA
Abstract :
ΣΔ modulators with higher-order noise shaping and multibit internal quantizers are described. A new realization method for single-stage high-order modulators is discussed, and a new multistage architecture with multibit quantizers and interstage scaling is described. A digital correction method for the effects of nonideal analog components of the multistage modulator is presented. Simulation results are included to verify the theoretical considerations
Keywords :
delta modulation; modulators; digital correction method; higher-order noise shaping; interstage scaling; multibit internal quantizers; multibit sigma-delta modulators; multistage architecture; nonideal analog components; Capacitors; Contracts; Delta modulation; Delta-sigma modulation; Dynamic range; Equations; Noise shaping; Oceans; Quantization; Stability;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112236
