Title :
High-order bandpass sigma-delta modulators for high speed D/A applications
Author :
Leong, C.H. ; Roberts, G.W.
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
3/13/1997 12:00:00 AM
Abstract :
A multiplier-free structure for implementing high-order bandpass digital sigma-delta modulators is described. Near-optimum noise suppression in the modulators passband region is attained after coefficient quantisation. High-speed operation is achieved as the critical delay path consists of only two adders in series, independent of the modulator order
Keywords :
digital-analogue conversion; interference suppression; modulators; sigma-delta modulation; bandpass sigma-delta modulators; coefficient quantisation; high speed D/A applications; high-order modulators; multiplier-free structure; near-optimum noise suppression;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970336
