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

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Title Statement <strong>High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs</strong>
 
Added Entry - Uncontrolled Name Tuntrakool, Sunti ; KMITL
Kumngern, Montree ; King Mongkut’s Institute of Technology Ladkrabang
Sotner, Roman
Herencsar, Norbert ; Brno University of Technology
Suwanjan, Peerawut ; King Mongkut’s Institute of Technology Ladkrabang
Jaikla, Winai ; Department of Engineering Education, Faculty of Industrial Education, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand
 
Uncontrolled Index Term Analog filter; VDDDA; Voltage-mode; Single input-Multiple output; Oscillator
 
Summary, etc. 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 (<em>LP</em>), high-pass (<em>HP</em>), band-reject (<em>BR</em>), all-pass (<em>AP</em>) and band-pass (<em>BP</em>) 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 <em>HP</em>, <em>AP</em> and <em>BR</em> 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.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2017-06-01 10:24:58
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJPAP/article/view/14214
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 55, ##issue.no## 5 (2017): Indian Journal of Pure & Applied Physics
 
Language Note en
 
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