THE APPLICATIONS EMPLOYED TO DESIGN A NEW KIND OF FILTER USING THE ACTIVE ELEMENT (VDBA)

Raoof Ismael, Arkan

doi:10.32894/kujss.2016.124378

	THE APPLICATIONS EMPLOYED TO DESIGN A NEW KIND OF FILTER USING THE ACTIVE ELEMENT (VDBA)
Kirkuk Journal of Science
Article 1, Volume 11, Issue 1, 2016, Pages 287-303 PDF (0 K)
DOI: 10.32894/kujss.2016.124378
Author
Arkan Raoof Ismael
Abstract
The paper presents a new configuration of biquad filters using the well known active element (VDBA) Voltage Differencing Buffered Amplifier. The proposed item contains properties such as high input impedance terminal and low output impedance terminal which allow perfect performance in voltage circuit fields. In addition, the circuit is used without exterior resistor because of the transconductance gain that exists in VDBA. The proper method to design such a filter is satisfied by using both active and passive elements. In this paper, two filter applications are designed based on Multi Inputs Single Output (MISO) filter configuration. The first proposed filter uses two VDBAs and two capacitors. Whereas, the second fılter contains two VDBAs, two capacitors and one resistor. Both circuits satisfy the voltage mode (low pass, band pass, high pass, band stop, & all pass) filters. The low output impedance of biquad filters award more cascadabilities for the voltage circuit. Moreover, the matching conditions of the conclusive elements are not needed. The adjustment in the resistance employed by the second biquad filter developed the quality factor to be as independent natural frequency. The introduced biquad filters are tested and simulated in LTSPICE simulator to confirm the theoretical concepts. The simulation results agree with the main theoretical concepts
Keywords
Voltage differencing Buffered Amplifier; CMOS Circuits; voltage mode filter; biquad filters; Multi Inputs Single Output; VDBA; CMOS

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