Title :
A comparison of two-stage, 4th-order and single state 2nd-order delta-sigma modulation in digital-to-analogue conversion systems
Author :
Hawksford, M.O.J.
Author_Institution :
Essex Univ., UK
Abstract :
Considers the application of delta-sigma modulation (DSM) as a means of digital-to-analogue conversion (DAC) where the aim is to compare conversion structures that can achieve a dynamic range approaching 20 bit (linear PCM resolution) over a 0-20 kHz frequency band. Specifically, a comparison is made between a 2nd-order noise shaped and oversampled 1 bit, DSM converter with a 4th-order multi-level, noise shaped scheme in tandem with an open-loop multi-level to 1 bit mapping converter
Keywords :
delta modulation; digital-analogue conversion; 0 to 20 kHz; DSM converter; conversion structures; digital-to-analogue conversion systems; dynamic range; noise shaped scheme; oversampling; single state 2nd-order delta-sigma modulation; two-stage fourth-order modulation;
Conference_Titel :
Analogue to Digital and Digital to Analogue Conversion, 1991., International Conference on
Conference_Location :
Swansea
Print_ISBN :
0-85296-524-9
