Title :
0.65V sigma-delta modulators
Author :
Sauerbrey, Jens ; Wittig, Martin ; Schmitt-Landsiedel, Doris ; Thewes, Roland
Author_Institution :
Corporate Res., Infineon Technol. AG, Munich, Germany
Abstract :
ΣΔ modulators for portable applications are presented operating within a large range of supply voltages. A 2nd order and a cascaded 3rd order modulator are designed in Switched-Opamp (SO) technique with common mode level shift. The circuits are realized in a 0.18μm CMOS process and occupy an area of 0.096 mm2 and 0.139 mm2, respectively. Neither low-VT devices nor voltage boosting techniques are used. Proper operation is obtained down to a supply voltage of 0.65V.
Keywords :
CMOS integrated circuits; cascade networks; sigma-delta modulation; switched networks; 0.18 micron; 0.65 V; CMOS; cascaded third-order modulator; common mode level shift; portable applications; second-order modulator; sigma-delta modulators; supply voltages; switched-opamp technique; Boosting; CMOS process; Circuit topology; Delta-sigma modulation; Dynamic voltage scaling; Feedback circuits; Low voltage; Modems; Robustness; Threshold voltage;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205740
