Title :
A 2μW biomedical frontend with ΣΔ ADC for self-powered U-healthcare devices in 0.18μm CMOS technology
Author :
Jha, Pankaj ; Patra, Pravanjan ; Naik, Jairaj ; Dutta, Ashudeb ; Acharya, Amit ; Rajalakshmi, P. ; Singh, Shiv Govind
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Hyderabad, Hyderabad, India
Abstract :
This paper presents an ultra-low power analog front end (AFE) with ΣΔ modulator ADC meant for acquisition of biopotential signals. The system consists of a signal conditioning stage with programmable gain and bandwidth, a mixed signal automatic gain control (AGC), and a ΣΔ ADC. The full system is designed in UMC 18μm CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47μW power consumption. The ADC provides 2nd order noise shaping while using single integrator and an ENOB of ~12 bits with 1.4μW power consumption. The system was successfully tested for a ECG signal from PTB database.
Keywords :
CMOS integrated circuits; automatic gain control; biomedical electronics; electrocardiography; health care; low-power electronics; mixed analogue-digital integrated circuits; sigma-delta modulation; ΣΔ modulator ADC; 2nd order noise shaping; AGC; CMOS technology; ECG signal; PTB database; UMC CMOS; biomedical frontend; biopotential signal acquisition; mixed signal automatic gain control; power 0.47 muW; power 1.4 muW; power 2 muW; power consumption; programmable bandwidth; programmable gain; self-powered U-healthcare devices; signal conditioning stage; single integrator; size 0.18 mum; ultra-low power analog front end; Detectors; Electrocardiography; Gain control; Modulation; Noise shaping; Power demand; Signal resolution;
Conference_Titel :
New Circuits and Systems Conference (NEWCAS), 2015 IEEE 13th International
Conference_Location :
Grenoble
DOI :
10.1109/NEWCAS.2015.7182054
