Title :
Improved multirate sigma-delta architecture
Author :
Colodro, F. ; Torralba, A.
Author_Institution :
Dept. Ingenieria Electron., Seville Univ., Spain
Abstract :
It has been shown that a multibit sigma-delta modulator can be built replacing the ADC in the forward path by an increment in the oversampling ratio of the last integrators of the loop. An improved topology is proposed which obtains similar performances with single-bit feedback, overcoming drawbacks inherent to high resolution DACs
Keywords :
integrating circuits; modulators; quantisation (signal); sigma-delta modulation; signal sampling; cancellation filter; high resolution DAC; improved topology; last integrators; multirate sigma-delta architecture; nonidealities influence; oversampling ratio increment; single bit quantizers; single-bit feedback; Bandwidth; Delay; Delta-sigma modulation; Digital filters; Digital modulation; Energy consumption; Frequency; Output feedback; Sampling methods; Topology;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921893
