Shadow universal filter with independent Q tuning at 0.45 V using MI-OTAs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0198757" target="_blank" >RIV/00216305:26220/26:0198757 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2590123025029561" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2590123025029561</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.rineng.2025.106904" target="_blank" >10.1016/j.rineng.2025.106904</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Shadow universal filter with independent Q tuning at 0.45 V using MI-OTAs

Popis výsledku v původním jazyce

This paper presents a novel shadow universal filter implemented in voltage mode, based on multiple-input operational transconductance amplifiers (MI-OTAs). The proposed shadow universal filter incorporates both non-inverting and inverting transfer functions for low-pass, high-pass, band-pass, band-stop, and all-pass responses within a single topology. The proposed filter is a shadow universal filter that employs low-pass and highpass filters feedback to the input. It enables independent control of the quality factor for all filtering responses through an external amplifier, without altering the natural frequency. Moreover, during quality factor tuning, any variation in passband gain can be compensated by appropriately adjusting the input signal configuration. These advantages of the proposed shadow universal filter are enabled by the multiple-input capability of the operational transconductance amplifier (OTA), which is implemented using the multiple-input bulk-driven MOS transistor (MIBD-MOST) technique. The MI-OTA operates at an ultra-low supply voltage of 0.45 V and consumes only 270 nW of power. For the low-pass shadow filter configuration, a dynamic range of 48 dB was achieved at 1% total harmonic distortion. Experimental validation was conducted using a prototype implemented with commercially available LM13700N integrated circuits, confirming the filter's functionality and effectiveness.

Název v anglickém jazyce

Shadow universal filter with independent Q tuning at 0.45 V using MI-OTAs

Popis výsledku anglicky

This paper presents a novel shadow universal filter implemented in voltage mode, based on multiple-input operational transconductance amplifiers (MI-OTAs). The proposed shadow universal filter incorporates both non-inverting and inverting transfer functions for low-pass, high-pass, band-pass, band-stop, and all-pass responses within a single topology. The proposed filter is a shadow universal filter that employs low-pass and highpass filters feedback to the input. It enables independent control of the quality factor for all filtering responses through an external amplifier, without altering the natural frequency. Moreover, during quality factor tuning, any variation in passband gain can be compensated by appropriately adjusting the input signal configuration. These advantages of the proposed shadow universal filter are enabled by the multiple-input capability of the operational transconductance amplifier (OTA), which is implemented using the multiple-input bulk-driven MOS transistor (MIBD-MOST) technique. The MI-OTA operates at an ultra-low supply voltage of 0.45 V and consumes only 270 nW of power. For the low-pass shadow filter configuration, a dynamic range of 48 dB was achieved at 1% total harmonic distortion. Experimental validation was conducted using a prototype implemented with commercially available LM13700N integrated circuits, confirming the filter's functionality and effectiveness.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21100 - Other engineering and technologies

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Results in Engineering

ISSN

2590-1230

e-ISSN

—

Svazek periodika

27

Číslo periodika v rámci svazku

September 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

001565573200003

EID výsledku v databázi Scopus

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