Publication detail

A 450 mV Tunable Low-Frequency OTA-C Third-Order Elliptic Low-Pass Filter for Bio-Signal Applications

KUMNGERN, M. KULEJ, T. KHATEB, F.

Original Title

A 450 mV Tunable Low-Frequency OTA-C Third-Order Elliptic Low-Pass Filter for Bio-Signal Applications

Type

journal article in Web of Science

Language

English

Original Abstract

This paper introduces a tunable third-order elliptic low-pass OTA-C filter specifically designed for biological signal applications. The proposed filter leverages a multiple-input operational transconductance amplifier (MI-OTA) that operates at low voltage and low power consumption. This innovative approach simplifies the filter topology and significantly reduces the number of active and passive components required. By utilizing the multiple-input capability of the OTA, the voltage gains of the low-pass transfer function can be easily increased. The filter operates with a supply voltage of 450 mV and consumes only 40.5 nW of power while achieving a cutoff frequency of 112.9 Hz and a dynamic range (DR) of 66.7 dB at 1% total harmonic distortion (THD). The filter's performance was validated through the effective filtering of interfering ECG signals. The design and simulations were carried out using the Cadence environment and TSMC's 0.18 mu m CMOS technology. Monte Carlo (MC) analysis and process, voltage, and temperature (PVT) corner analysis were conducted to ensure the robustness of the design.

Keywords

Active filter; operational transconductance amplifier; low-voltage low-power circuit; biomedical system

Authors

KUMNGERN, M.; KULEJ, T.; KHATEB, F.

Released

24. 2. 2025

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Location

PISCATAWAY

ISBN

2169-3536

Periodical

IEEE Access

Year of study

13

Number

24 February 2025

State

United States of America

Pages from

36224

Pages to

36232

Pages count

9

URL

https://ieeexplore.ieee.org/document/10900345

BibTex

@article{BUT197339,
  author="Montree {Kumngern} and Tomasz {Kulej} and Fabian {Khateb}",
  title="A 450 mV Tunable Low-Frequency OTA-C Third-Order Elliptic Low-Pass Filter for Bio-Signal Applications",
  journal="IEEE Access",
  year="2025",
  volume="13",
  number="24 February 2025",
  pages="36224--36232",
  doi="10.1109/ACCESS.2025.3544735",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/document/10900345"
}