Title :
Design and implementation of sigma-delta D/A converters with optimized loop filters
Author :
Horbach, Ulrich ; Lang, Markus
Author_Institution :
Lehrstuhl fur Nachrichtentechnik, Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
Two novel procedures are presented for the design of optimum loop filters for oversampling D/A converters. FIR as well as IIR systems are proposed for this purpose. Whereas the nonrecursive filters can be implemented more easily in combination with the interpolator, the recursive ones shows better results in terms of the desired noise suppression for a given oversampling ratio. Stable modulators of arbitrary order can be designed with any desired number of quantization levels at the output. Examples of practical implementations are given
Keywords :
delta modulation; digital filters; digital-analogue conversion; interference suppression; interpolation; modulators; FIR filters; IIR filters; design; interpolator; modulators; noise suppression; nonrecursive filters; optimized loop filters; oversampling D/A converters; quantization levels; sigma-delta D/A converters; Baseband; Delta-sigma modulation; Design optimization; Digital modulation; Finite impulse response filter; Frequency; IIR filters; Low pass filters; Quantization; Signal to noise ratio;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176696
