11. A DIGITALLY ASSISTED DYNAMICALLY RECONFIGURABLE ANALOG FRONT-END WITH DATA-DEPENDENT POWER REDUCTION FOR PHYSIOLOGICAL SENSING APPLICATIONS
Name: Somok Mondal
Grad Year: 2018
A typical bio-signal acquision system consisting of a low-noise bio-potential amplifier, an ADC and a DSP back-end is traditionally designed corresponding to the worst-case operation scenarios. Hence, such a design, with the various performance parameters being fixed and over-designed, generally consumes a higher power than needed. However, a front-end as the one presented in this work which could be adapted or reconfigured based on an appropriate feedback from the DSP can ovecome such a drawback. Implemented in 65nm CMOS, the analog front-end (AFE) has a number of digitally programmable modes with the input referred noise ranging between 1.90μV_rms in 250Hz to 3.89μV_rms in 420Hz and drawing 307nW to 769nW power from a 0.8V supply. The designed AFE with agile, on-the-fly, noise-power reconfiguration is used to achieve signal-activity dependent power savings of 2.5× for an ECG signal while still acquiring pristine signal-features of interest.
Industry Application Area(s)
Electronics/Photonics | Life Sciences/Medical Devices & Instruments | Semiconductor