Circuits and Systems

Volume 6, Issue 3 (March 2015)

ISSN Print: 2153-1285   ISSN Online: 2153-1293

Google-based Impact Factor: 0.48  Citations  

VDTA Based Electronically Tunable Voltage-Mode and Trans-Admittance Biquad Filter

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DOI: 10.4236/cs.2015.63010    4,158 Downloads   5,433 Views  Citations

ABSTRACT

In this paper, a biquad filter configuration based on two voltage differencing transconductance amplifiers (VDTAs) as newly active elements and only two capacitors as passive elements is proposed which can realize voltage-mode low pass (LP), band pass (BP), high pass (HP), band reject (BR) and all pass (AP) filtering responses using three voltage inputs. Simultaneously, the same configuration can also be used to obtain LP, BP and HP filtering responses in transadmittance-mode. The proposed biquad is capable of providing electronic control of quality factor independent of pole frequency through single transconductance parameter (biasing current). It also offers the advantage of low active and passive sensitivity. To support the theoretical analysis, the PSPICE simulation of the proposed circuit is done using 0.18 μm CMOS technology from TSMC.

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Gupta, G. , Singh, S. and Bhooshan, S. (2015) VDTA Based Electronically Tunable Voltage-Mode and Trans-Admittance Biquad Filter. Circuits and Systems, 6, 93-102. doi: 10.4236/cs.2015.63010.

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