Low-power analog integrated circuits for wireless ECG acquisition systems

Tsung Heng Tsai*, Jia Hua Hong, Liang Hung Wang, Shuenn Yuh Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


This paper presents low-power analog ICs for wireless ECG acquisition systems. Considering the power-efficient communication in the body sensor network, the required low-power analog ICs are developed for a healthcare system through miniaturization and system integration. To acquire the ECG signal, a low-power analog front-end system, including an ECG signal acquisition board, an on-chip low-pass filter, and an on-chip successive-approximation analog-to-digital converter for portable ECG detection devices is presented. A quadrature CMOS voltage-controlled oscillator and a 2.4 GHz direct-conversion transmitter with a power amplifier and upconversion mixer are also developed to transmit the ECG signal through wireless communication. In the receiver, a 2.4 GHz fully integrated CMOS RF front end with a low-noise amplifier, differential power splitter, and quadrature mixer based on current-reused folded architecture is proposed. The circuits have been implemented to meet the specifications of the IEEE 802.15.4 2.4 GHz standard. The low-power ICs of the wireless ECG acquisition systems have been fabricated using a $0.18 \mu$m Taiwan Semiconductor Manufacturing Company (TSMC) CMOS standard process. The measured results on the human body reveal that ECG signals can be acquired effectively by the proposed low-power analog front-end ICs.

Original languageEnglish
Article number6157624
Pages (from-to)907-917
Number of pages11
JournalIeee Transactions On Information Technology In Biomedicine
Issue number5
StatePublished - 2012


  • Analog filter
  • analog front-end ICs
  • analog-to-digital converter (ADC)
  • ECG signal acquisition
  • low noise amplifier (LNA)
  • low-power circuits
  • power amplifier (PA)
  • power splitter
  • quadrature mixer
  • quadrature voltage-controlled oscillator (QVCO)


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