Title :
The design of high-order delta-sigma modulators for bandpass A/D conversion
Author :
Abcarius, John ; Louis, Loai ; Roberts, Gordon W.
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
Abstract :
This paper examines the practical issues involved in building high-order delta-sigma modulators through the design and implementation of a switched capacitor (SC) eighth-order bandpass modulator. The design process adopted is illustrated starting from the theoretical noise transfer function (NTF) through to the consideration of practical implementation issues. The design verification procedure is also discussed and the effects of process variation in terms of both performance and stability are examined. A prototype modulator has been implemented in a 0.8 μm BiCMOS process and is currently under fabrication
Keywords :
BiCMOS integrated circuits; analogue-digital conversion; circuit stability; integrated circuit design; modulators; network synthesis; sigma-delta modulation; switched capacitor networks; 0.8 micron; ADC; BiCMOS process; SC eighth-order bandpass modulator; bandpass A/D conversion; design process; design verification procedure; high-order delta-sigma modulators; noise transfer function; process variation; stability; switched capacitor bandpass modulator; Bandwidth; Delta modulation; Demodulation; Digital communication; Filtering theory; Frequency; Iron; Modulation coding; Signal design; Stability;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.666086
