title: In vivo characterization of a versatile 8-channel digital biopotential recording system with sub-μVRMS input noise.
abstract: This work presents the design and testing of an integrated 8-channel CMOS biopotential recording chip, consisting of low-noise input stages, tunable second stage, a multiplexer, and two analog-to-digital converters (ADC). Through its variable supply concept, the integrated input-referred noise of the first stage is selectable from 1.5 down to 0.63 μVRMS (ISS = 200 μA), which is superior to standard laboratory recording systems. The device features variable lower and upper corner frequencies, and outputs two digital 16-bit data streams at 62.5 kS/s. The chip die was fabricated in X-Fab 0.35 μm CMOS technology and has an area of 10 mm2.
authors.forename: Oscar F
authors.initials: OF
authors.lastname: Cota
authors.forename: Dennis
authors.initials: D
authors.lastname: Plachta
authors.forename: Thomas
authors.initials: T
authors.lastname: Stieglitz
authors.forename: Sarath
authors.initials: S
authors.lastname: Kundumattathil
authors.forename: Yiannos
authors.initials: Y
authors.lastname: Manoli
authors.forename: Matthias
authors.initials: M
authors.lastname: Kuhl
mesh_terms: D000703:Analog-Digital Conversion; D004867:Equipment Design; D008670:Metals / Q000737:chemistry*; D010087:Oxides; D012666:Semiconductors; D059629:Signal-To-Noise Ratio
chemical_list: D008670:Metals; D010087:Oxides