Title :
A 1V low power second-order delta-sigma modulator for biomedical signal applicaion
Author :
Chih-han Hsu ; Kea-Tiong Tang
Author_Institution :
Nat. Tsing-Hua Univ., Hsinchu, Taiwan
Abstract :
This paper presents the design and implementation of a low-power delta-sigma modulator for biomedical application with a standard 90nm CMOS technology. The delta-sigma architecture is implemented as 2nd order feedforward architecture. A low quiescent current operational transconductance amplifier (OTA) is utilized to reduce power consumption. This delta-sigma modulator operated in 1V power supply, and achieved 64.87 dB signal to noise distortion ratio (SNDR) at 10 KHz bandwidth with an oversampling ratio (OSR) of 64. The power consumption is 17.14 μW, and the figure-of-merit (FOM) is 0.60 pJ/conv.
Keywords :
CMOS integrated circuits; delta-sigma modulation; medical signal processing; operational amplifiers; power consumption; signal denoising; 2nd order feedforward architecture; OTA; bandwidth 10 kHz; biomedical signal applicaion; delta-sigma architecture; figure-of-merit; low power second-order delta-sigma modulator; low quiescent current operational transconductance amplifier; oversampling ratio; power 17.14 muW; power consumption; power supply; signal-noise distortion ratio; standard CMOS technology; voltage 1 V; Band-pass filters; Digital filters; Feedforward neural networks; Modulation; Noise; Passive filters; Power demand;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE
Conference_Location :
Osaka
DOI :
10.1109/EMBC.2013.6609924
