A 0.09 μ W low power front-end biopotential amplifier for biosignal recording

Yuhwai Tseng*, Yingchieh Ho, Shuoting Kao, Chau-Chin Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


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 0.09 μW , respectively.

Original languageEnglish
Article number6172530
Pages (from-to)508-516
Number of pages9
JournalIEEE Transactions on Biomedical Circuits and Systems
Issue number5
StatePublished - 27 Mar 2012


  • Biopotential recording
  • chopper amplifier
  • flicker noise
  • instrumentation amplifier

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