Title :
A 1-V 32-µW 13-bit CMOS Sigma-Delta A/D converter for biomedical applications
Author :
Muthusamy, Kanesan ; Teo, T. Hui ; Xu, Yong Ping
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
This paper describes a low power, low voltage sigma-delta analog to digital converter which consists of a sigma-delta modulator (SDM) and a decimation digital filter. A power efficient class AB OP-AMP, derived from inverter-like amplifier circuit, is proposed and a modified digital filter structure is employed for low frequency operation. Designed in a 0.18-μm CMOS technology, the overall SD-ADC is able to achieve an ENOB of 13.4 bit, a dynamic range of 88.6 dB and a peak SNR of 82.7 dB. The total power consumption of the ADC is 32 μW.
Keywords :
CMOS integrated circuits; biomedical electronics; digital filters; low-power electronics; operational amplifiers; sigma-delta modulation; CMOS sigma-delta A/D converter; amplifier circuit; biomedical applications; class AB OP-AMP; decimation digital filter; low power electronics; low voltage analog to digital converter; sigma-delta modulator; Analog-digital conversion; CMOS technology; Circuits; Delta-sigma modulation; Digital filters; Digital modulation; Dynamic range; Frequency; Low voltage; Operational amplifiers; A/D converter; Sigma-delta modulator; digital filter; operational amplifier;
Conference_Titel :
ASIC, 2009. ASICON '09. IEEE 8th International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-1-4244-3868-6
Electronic_ISBN :
978-1-4244-3870-9
DOI :
10.1109/ASICON.2009.5351498
