Publication detail

New voltage-mode universal filter and sinusoidal oscillator using only single DBTA

HERENCSÁR, N. KOTON, J. VRBA, K. LATTENBERG, I.

Original Title

New voltage-mode universal filter and sinusoidal oscillator using only single DBTA

Czech Title

Nový univerzální filtr a oscilátor v napěťovém módu s jedním DBTA

English Title

New voltage-mode universal filter and sinusoidal oscillator using only single DBTA

Type

journal article

Language

en

Original Abstract

In this article, a new voltage-mode second-order universal frequency filter and sinusoidal oscillator using only single differential-input buffered and transconductance amplifier (DBTA) is presented. The proposed voltage-mode filter structure using single DBTA and four passive elements can provide all standard filter functions, i.e. low-, band-, high-pass, band-stop, and all-pass without changing the circuit topology and enables independent control of the quality factor Q using single passive element. The circuit requires the minimal number of active and passive elements with no conditions for component matching. By slight modification of the proposed filter structure, the new DBTA-based sinusoidal oscillator is easily obtained. The oscillation condition and the oscillation frequency are independently adjustable by different virtually grounded passive elements. The proposed sinusoidal oscillator employs only grounded capacitors. The passive and active sensitivities of all the proposed circuit configurations are low. PSPICE simulations using a BJT realisation of DBTA and experimental results based on commercially available amplifiers OPA860 and MAX436 are included, which prove the workability of the proposed circuits.

Czech abstract

V tomto článku nový univerzální filtr druhého řádu a oscilátor v napěťovém módu pouze s jedním differential-input buffered and transconductance amplifier (DBTA) jsou prezentovány. Navržený filtr s jedním DBTA a čtyřmi pasivními prvky umožňuje realizovat všechny standardní filtrační funkce bez změny topologie. Navržený oscilátor byl obdržen s mírnou modifikací filtru. Vlastnosti obou struktur byly ověřeny simulací s bipolární strukturou a funkčnost filtrů také experimentálním měřením.

English abstract

In this article, a new voltage-mode second-order universal frequency filter and sinusoidal oscillator using only single differential-input buffered and transconductance amplifier (DBTA) is presented. The proposed voltage-mode filter structure using single DBTA and four passive elements can provide all standard filter functions, i.e. low-, band-, high-pass, band-stop, and all-pass without changing the circuit topology and enables independent control of the quality factor Q using single passive element. The circuit requires the minimal number of active and passive elements with no conditions for component matching. By slight modification of the proposed filter structure, the new DBTA-based sinusoidal oscillator is easily obtained. The oscillation condition and the oscillation frequency are independently adjustable by different virtually grounded passive elements. The proposed sinusoidal oscillator employs only grounded capacitors. The passive and active sensitivities of all the proposed circuit configurations are low. PSPICE simulations using a BJT realisation of DBTA and experimental results based on commercially available amplifiers OPA860 and MAX436 are included, which prove the workability of the proposed circuits.

Keywords

active filter; analogue signal processing; universal frequency filter; differential-input buffered and transconductance amplifier (DBTA); voltage-mode; sinusoidal oscillator

RIV year

2010

Released

01.04.2010

Publisher

Taylor & Francis

Pages from

365

Pages to

379

Pages count

15

URL

Full text in the Digital Library

BibTex


@article{BUT48778,
  author="Norbert {Herencsár} and Jaroslav {Koton} and Kamil {Vrba} and Ivo {Lattenberg}",
  title="New voltage-mode universal filter and sinusoidal oscillator using only single DBTA",
  annote="In this article, a new voltage-mode second-order universal frequency filter and sinusoidal oscillator using only single differential-input buffered and transconductance amplifier (DBTA) is presented. The proposed voltage-mode filter structure using single DBTA and four passive elements can provide all standard filter functions, i.e. low-, band-, high-pass, band-stop, and all-pass without changing the circuit topology and enables independent control of the quality factor Q using single passive element. The circuit requires the minimal number of active and passive elements with no conditions for component matching. By slight modification of the proposed filter structure, the new DBTA-based sinusoidal oscillator is easily obtained. The oscillation condition and the oscillation frequency are independently adjustable by different virtually grounded passive elements. The proposed sinusoidal oscillator employs only grounded capacitors. The passive and active sensitivities of all the proposed circuit configurations are low. PSPICE simulations using a BJT realisation of DBTA and experimental results based on commercially available amplifiers OPA860 and MAX436 are included, which prove the workability of the proposed circuits.",
  address="Taylor & Francis",
  chapter="48778",
  doi="10.1080/00207210903325229",
  institution="Taylor & Francis",
  journal="INTERNATIONAL JOURNAL OF ELECTRONICS",
  number="4",
  volume="97",
  year="2010",
  month="april",
  pages="365--379",
  publisher="Taylor & Francis",
  type="journal article"
}