Title :
Excess loop delay effects in continuous-time delta-sigma modulators and the compensation solution
Author :
Gao, Wenzhong ; Shoaei, Omid ; Snelgrove, W. Martin
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
Abstract :
In this paper, we show that excess loop delay seriously degrades the performance of continuous-time delta-sigma modulators (ΔΣM´s). It is then demonstrated in theory that the effect can be alleviated by tuning the feedback digital-to-analog converter pulse-shaping coefficients
Keywords :
circuit feedback; circuit tuning; compensation; continuous time systems; delays; modulators; sigma-delta modulation; transfer functions; compensation; continuous-time delta-sigma modulator; excess loop delay effects; feedback DAC pulse-shaping coefficients; tuning; Analog-digital conversion; Band pass filters; Clocks; Degradation; Delay effects; Delta modulation; Prototypes; Pulse modulation; Resonator filters; Transfer functions;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608531
