Detail publikace

Design of Shadow Filter Using Low-Voltage Multiple-Input Operational Transconductance Amplifiers

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

Originální název

Design of Shadow Filter Using Low-Voltage Multiple-Input Operational Transconductance Amplifiers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper introduces shadow filters that employ multiple-input operational transconductance amplifiers (MI-OTAs) as the active component. Two configurations of shadow filters are proposed. The first configuration, in contrast to previous designs, enables the adjustment of the quality factor without affecting the passband gains of the BPF, LPF, and HPF, thus achieving optimal frequency responses for these filters. The second configuration allows for the variation of the natural frequency without impacting the passband gains of the HPF, LPF, and BPF, maintaining constant passband gains. Moreover, the natural frequency can be electronically controlled by modifying parameters of the original biquad filters, providing advantages in compensating for process, voltage, and temperature variations. The MI-OTA is designed to provide multiple-input differential terminals using the multiple-input bulk-driven MOS transistor (MIBD-MOST) technique, allowing differential input signals to be converted into current output through its transconductance gain. The OTA operates at a supply voltage of 450 mV and consumes 81 nW of power, with the MOS transistors operating in weak inversion. The OTA and shadow filters were designed and simulated using a 0.18 mu m CMOS process to validate the functionality and performance of the proposed circuits.

Klíčová slova

operational transconductance amplifier; shadow filter; multiple-input bulk-driven MOS transistor; universal filter

Autoři

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

Vydáno

14. 1. 2025

Nakladatel

MDPI

Místo

BASEL

ISSN

2076-3417

Periodikum

Applied Sciences - Basel

Ročník

15

Číslo

2

Stát

Švýcarská konfederace

Strany od

1

Strany do

19

Strany počet

19

URL

https://doi.org/10.3390/app15020781

BibTex

@article{BUT196609,
  author="Montree {Kumngern} and Fabian {Khateb} and Tomasz {Kulej} and Natchayathorn {Wattikornsirikul}",
  title="Design of Shadow Filter Using Low-Voltage Multiple-Input Operational Transconductance Amplifiers",
  journal="Applied Sciences - Basel",
  year="2025",
  volume="15",
  number="2",
  pages="1--19",
  doi="10.3390/app15020781",
  issn="2076-3417",
  url="https://doi.org/10.3390/app15020781"
}