Title :
Bandpass Delta-Sigma modulators synthesis with high loop delay
Author :
Yahia, Abdeljalil ; Benabes, Philippe ; Kielbasa, Richard
Author_Institution :
Ecole Superieure d´´Electr., Gif-sur-Yvette, France
Abstract :
A new analysis and synthesis method for continuous time bandpass Delta-Sigma (ΔΣ) modulators is presented in this paper. This method makes it possible to synthesize continuous bandpass ΔΣ modulators from discrete time topologies and it takes into account DAC+ADC delay and rise time. Theoretically, high loop delay can be achieved and non-ideal DAC can be used without effect on the performance of the modulator, if some special feedback schematics are used
Keywords :
circuit feedback; delta-sigma modulation; modulators; network analysis; network synthesis; network topology; ADC delay; DAC delay; bandpass delta-sigma modulators; continuous time bandpass delta-sigma modulators; discrete time topologies; feedback schematics; loop delay; noise transfer function; performance; rise time; Analog-digital conversion; Delay effects; Delta modulation; Design methodology; Feedback; Laplace equations; Sampling methods; Shape; Topology; Transfer functions;
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.2001.921863
