title: A 0.09 μW low power front-end biopotential amplifier for biosignal recording.
abstract: This work presents a biopotential front-end amplifier in which the MOS transistors are biased in subthreshold region with a supply voltage and current of 0.4-0.8 V and 0.23-1.86 μA, respectively, to reduce the system power. Flicker noise is then removed using a chopping technique, and differential interference produced by electrode impedance imbalance is suppressed using a Gm-C filter. Additionally, the circuit is fabricated using TSMC 0.18 μm CMOS technology with a core area of 0.77 × 0.36 mm². With a minimum supply voltage of 0.4 V, the measured SNR and power consumption of the proposed IC chip are 54.1 dB and 0.09μW, respectively.
authors.affiliation: Electrical Engineering Department and Institute of Electrical Control Engineering, National Chiao Tung University, Hsinchu 300, Taiwan. yuhwaitseng@mail.nctu.edu.tw
authors.forename: Yuhwai
authors.initials: Y
authors.lastname: Tseng
authors.forename: Yingchieh
authors.initials: Y
authors.lastname: Ho
authors.forename: Shuoting
authors.initials: S
authors.lastname: Kao
authors.forename: Chauchin
authors.initials: C
authors.lastname: Su
mesh_terms: D000669:Amplifiers, Electronic; D001698:Biomedical Engineering; D017097:Electric Impedance; D004562:Electrocardiography / Q000295:instrumentation / Q000706:statistics & numerical data; D004569:Electroencephalography / Q000295:instrumentation / Q000706:statistics & numerical data; D004576:Electromyography / Q000295:instrumentation / Q000706:statistics & numerical data; D004867:Equipment Design; D006801:Humans; D012666:Semiconductors; D059629:Signal-To-Noise Ratio; D013686:Telemetry / Q000295:instrumentation*; D014173:Transistors, Electronic