Title :
A sigma-delta modulator topology with high linearity
Author :
Magrath, A.J. ; Sandler, M.B.
Author_Institution :
Dept. of Electron. & Electr. Eng., King´´s Coll., London, UK
Abstract :
A ΣΔ modulator topology is presented which achieves high linearity by modifying the transfer function of the quantizer in the loop. It is applicable to both A-D and D-A converters. Particular implementation advantages are gained in the A-D case because no random noise source is required. Results are presented which show also that, in comparison to conventional quantizer dithering, the scheme has excellent dynamic range properties
Keywords :
circuit noise; circuit stability; digital-analogue conversion; modulators; quantisation (signal); sigma-delta modulation; transfer functions; A/D converters; ADC; D/A converters; DAC; bit flipping; dither; dynamic range properties; high linearity; quantizer transfer function; sigma-delta modulator topology; transfer function modification; Attenuation; Chaotic communication; Circuit topology; Delta-sigma modulation; Dynamic range; Educational institutions; Filters; Frequency; Limit-cycles; Linearity;
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.1997.608521
