A 0.6-V 540-nW delta-sigma modulator for biomedical sensors

作者：Yoon Younghyun; Roh Hyungdong; Lee Hyuntae; Roh Jeongjin^*

来源：Analog Integrated Circuits and Signal Processing, 2013, 75(2): 323-327.

DOI：10.1007/s10470-013-0053-7

• Delta-sigma converter
• Analog-to-digital converter
• Biomedical sensor
• Bulk-driven
• Operational transconductance amplifier

This paper presents an extremely low-power delta-sigma modulator for battery-powered biomedical sensors. Distributed feed-forward architecture is used to achieve efficient operation at a supply voltage of 0.6 V. In order to achieve a wide input range in this low voltage environment, the bulk-driven operational transconductance amplifier is designed with a self-cascode output stage. The modulator has a dynamic range of 52 dB with only 540 nW of power for the 250-Hz bandwidth. Such a significant reduction in power consumption allows diverse battery-powered biomedical applications that have limited battery power, such as the electro-oculogram, electroencephalogram, and electrocardiogram.

• 出版日期2013-5