Publication detail

High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs

TUNTRAKOOL, S. KUMNGERN, M. ŠOTNER, R. HERENCSÁR, N. SUWANJAN, P. JAIKLA, W.

Original Title

High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs

Type

journal article in Web of Science

Language

English

Original Abstract

The second order universal voltage-mode filter using voltage differencing differential difference amplifiers (VDDDAs) has been proposed. It has high input impedance voltage-mode biquad filter with orthogonal tune of natural frequency and quality factor. The proposed filter simultaneously provides five filter responses: low-pass (LP), high-pass (HP), band-reject (BR), all-pass (AP) and band-pass (BP) in the same circuit topology. The natural frequency and quality factor can be tuned electronically and orthogonally dc bias current. The output impedance at output nodes HP, AP and BR has low impedance which can connect to other circuit without the use of voltage buffers. The proposed filter consists of three VDDDAs, one grounded resistor and two grounded capacitors. This makes the proposed filter suitable for integrated circuit development. With slightly modifying the proposed filter, the voltage-mode qudrature sinusoidal oscillator with low output impedance and independent control of condition of oscillation (CO) and frequency of oscillation (FO) has been achieved. The results shown in this paper are from PSPICE simulation and experiment to validate the proposed circuits.

Keywords

Analog filter, VDDDA, Voltage-mode, Single input-multiple output, Oscillator

Authors

TUNTRAKOOL, S.; KUMNGERN, M.; ŠOTNER, R.; HERENCSÁR, N.; SUWANJAN, P.; JAIKLA, W.

Released

23. 5. 2017

Publisher

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)

Location

CSIR-NISCAIR India Dr. K.S.Krishnan Marg

ISBN

0019-5596

Periodical

INDIAN JOURNAL OF PURE & APPLIED PHYSICS

Year of study

55

Number

5

State

Republic of India

Pages from

324

Pages to

332

Pages count

9

URL

http://nopr.niscair.res.in/handle/123456789/41817

Full text in the Digital Library

http://hdl.handle.net/11012/69294

BibTex

@article{BUT135971,
  author="Sunti {Tuntrakool} and Montree {Kumngern} and Roman {Šotner} and Norbert {Herencsár} and Peerawut {Suwanjan} and Winai {Jaikla}",
  title="High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs",
  journal="INDIAN JOURNAL OF PURE & APPLIED PHYSICS",
  year="2017",
  volume="55",
  number="5",
  pages="324--332",
  issn="0019-5596",
  url="http://nopr.niscair.res.in/handle/123456789/41817"
}