Title :
Modelling and performance estimation of sigma-delta modulators
Author :
Ritoniemi, Tapani ; Karema, Teppo ; Tenhunen, Hannu
Author_Institution :
Signal Process. Lab., Tampere Univ. of Technol., Finland
Abstract :
New results for sigma-delta modulator (SDM) modeling are presented. The noise performance, i.e. SNR of an SDM, is solved using a linear model with an additive noise source. The relations are derived by identifying a proper invariant for the quantizer. An accurate model for baseband characteristics of SDM is still lacking due to the nonlinearity of the 1-b quantizer. The frequency response relations of the baseband of the SDM is found to be non-trivial
Keywords :
electron device noise; frequency response; modulators; performance evaluation; random noise; SNR; additive noise source; baseband characteristics; frequency response; linear model; noise; nonlinearity; performance estimation; sigma-delta modulators; Additive noise; Baseband; Delta-sigma modulation; Noise shaping; Quantization; Signal processing; Signal to noise ratio; Stability; Transfer functions; Voltage;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176104
