A 0.6-V, 0.015-mm2, time-based ECG readout for ambulatory applications in 40-nm CMOS

© 2016 IEEE. A scalable time-based analog front end in 40-nm CMOS is presented for ECG readout for ambulatory applications. The main challenge addressed is achieving a large dynamic range readout (necessary to handle large signals during motion) in a power and area-efficient manner at low voltage supplies while also tackling the challenges of increase in flicker noise and gate-leakage current. Demonstrated results show a significant improvement in ac-dynamic range without compromising on area (0.015 mm2) and power consumption (3.3∼ μW). This paper will be relevant toward developing low-cost, low-power sensor system-on-chips required for wearable biomedical applications.status: publishe

An artificial iris ASIC with high voltage liquid crystal driver, 10 nA light range detector and 40 nA blink detector for LCD flicker removal

In a normally functioning eye, the iris controls the pupil diameter to regulate the amount of light reaching the retina. Various iris deficiencies exist, manifesting as defects in the iris or an absence of one which result in too much light reaching the retina. Some iris deficiencies, such as aniridia or leiomyoma, can be mitigated with fixed or adaptive artificial irises. As an alternative, adaptive transparency glasses may also alleviate this situation, however, both solutions do not mimic the other normal functionality of the natural iris: adaptive aperture. To address this, we developed a fully encapsulated, self-contained artificial iris embedded in a smart contact lens. The control ASIC of the contact lens is developed in 0.18-μm 16-V BCD TSMC and has a typical power consumption of 1.9 μW from a 3-V supply voltage at office light condition

Advances in biomedical sensor systems for wearable health

This book chapter will discuss advancements in analog circuit design specifically for various wearable healthcare applications. There are a number of general trends that can be observed in this field, like multimodal sensing applications, which will be discussed. There will be a focus on analog circuits for some of the most relevant signal modalities including ExG, bio-impedance, and photoplethysmogram (PPG). Common circuit topologies and some recent state-of-the-art implementations for those will be discussed

Advances in biomedical sensor systems for wearable health

This book chapter will discuss advancements in analog circuit design specifically for various wearable healthcare applications. There are a number of general trends that can be observed in this field, like multimodal sensing applications, which will be discussed. There will be a focus on analog circuits for some of the most relevant signal modalities including ExG, bio-impedance, and photoplethysmogram (PPG). Common circuit topologies and some recent state-of-the-art implementations for those will be discussed