Title :
A low-power Gm-C-based CT-ΔΣ audio-band ADC in 1.1V 65nm CMOS
Author :
Ahmed, Imran ; Cherry, James ; Hasan, Ayaz ; Nafee, Akram ; Halupka, David ; Allasasmeh, Younis ; Snelgrove, Martin
Author_Institution :
Kapik Integration Toronto, Toronto, ON, Canada
Abstract :
A low power CT-ΔΣ is presented which achieves 92dBA of dynamic range while consuming only 110μA from a 1.1V supply in 65nm. The ADC exploits the inherent virtual ground of the ΔΣ loop to enable low power Gm-C integrators, and a simplified excess loop-delay compensation scheme. A common-mode feedback circuit which enables low voltage operation is also presented.
Keywords :
CMOS digital integrated circuits; circuit feedback; delay circuits; delta-sigma modulation; integrating circuits; low-power electronics; ΔΣ loop; CMOS; CT ΔΣ audio-band ADC; Gm-C integrators; common-mode feedback circuit; current 110 muA; delta-sigma; loop-delay compensation scheme; size 65 nm; voltage 1.1 V; Bandwidth; CMOS integrated circuits; Computer architecture; Dynamic range; Linearity; Microprocessors; Modulation;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231296
