A Fifth-Order Butterworth OTA-C LPF with Multiple-Output Differential-Input OTA for ECG Applications

Chuan Yu Sun, Shuenn Yuh Lee

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

This brief proposes a fifth-order Butterworth operational transconductance amplifier-C (OTA-C) low-pass filter (LPF) with multiple-output differential-input (MODI) OTA structure and metal-insulator-metal capacitors for electrocardiography applications. The current division technology is used as an alternative output pair to provide multiple outputs and achieve high linearity. This technique reduces the number of OTAs of the fifth-order LPF from 11 to 6 as compared with the conventional structure. The design issue of linearity is also considered in the implementation of MODI OTA. The proposed filter is fabricated in a 0.18 μ m complementary metal-oxide-semiconductor technology with an area of 0.12 mm2. The LPF achieved a total harmonic distortion of 49.8 dBc under a bandwidth of 50 Hz and input voltage of 86 mV pp at a 1-V supply voltage. The total power dissipation is 350 nW.

Original languageEnglish
Pages (from-to)421-425
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume65
Issue number4
DOIs
Publication statusPublished - 2018 Apr

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A Fifth-Order Butterworth OTA-C LPF with Multiple-Output Differential-Input OTA for ECG Applications'. Together they form a unique fingerprint.

Cite this