Title :
A multi-feedback design for LC bandpass delta-sigma modulators
Author :
Shoaei, Omid ; Snelgrove, W. Martin
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
fDate :
30 Apr-3 May 1995
Abstract :
A new technique for designing an LC bandpass delta-sigma modulator is presented. This method is based on pulse shaping of a DAC output signal such that one can realize a desired (arbitrary) loop transfer function. Especially for higher-order modulators where extra LC sections are added, sufficient number of parameters are provided in the feedback loop. It is shown that by creating more degrees of freedom one can achieve the maximum SNR in a given modulator order without constraining the noise transfer function of the modulator
Keywords :
circuit feedback; circuit noise; modulators; pulse shaping circuits; sigma-delta modulation; transfer functions; DAC output signal; LC bandpass delta-sigma modulator; SNR; loop transfer function; multi-feedback design; noise; pulse shaping; Convolution; Delay effects; Delta modulation; Feedback loop; Filtering theory; Filters; Hydrogen; Propagation delay; Pulse modulation; Transfer functions;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.521478
