Title :
Fully differential CMOS sigma-delta modulator for high performance analog-to-digital conversion with 5 V operating voltage
Author :
Ritoniemi, Tapani ; Karema, Teppo ; Tenhunen, Hannu ; Lindell, Markku
Author_Institution :
Dept. of Electr. Eng., Tampere Univ. of Technol., Finland
Abstract :
The authors present a high-performance second-order sigma-delta modulator for modem and ISDN (integrated-services digital network) analog-to-digital (A/D) conversion applications. The major performance design limiting factors are demonstrated. It is shown that a true 16-bit A/D converter with single 5-V power supply for voice band can be realized with an oversampling ratio of 512; and a 16-bit dynamic range is achieved with an oversampling ratio of 256. The die size of the proposed modulator, using 2.5- mu m CMOS technology, is only 0.56 mm/sup 2/.<>
Keywords :
CMOS integrated circuits; ISDN; analogue-digital conversion; delta modulation; modems; 2.5 micron; 5 V; 5 V operating voltage; ADC; ISDN; analog-to-digital conversion; die size; differential CMOS sigma-delta modulator; dynamic range; integrated-services digital network; modem; oversampling ratio; performance design limiting factors; second-order sigma-delta modulator; voice band; Analog-digital conversion; CMOS technology; Circuit simulation; Delta-sigma modulation; Digital signal processing chips; Dynamic range; Noise shaping; Signal to noise ratio; Transfer functions; Voltage;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15409
