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Realization of current-mode KHN-equivalent biquad filter using ZC-CFTAs and grounded capacitors

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Field	Value

Title	Realization of current-mode KHN-equivalent biquad filter using ZC-CFTAs and grounded capacitors

Creator	Satansup, Jetsdaporn Tangsrirat, Worapong

Subject	Z-copy current follower transconductance amplifier Kerwin-Huelsman-Newcomb Biquad filter Current-mode circuit

Description	841-846 In this paper, a current-mode Kerwin-Huelsman-Newcomb (KHN) filter structure employing four z-copy current follower transconductance amplifiers (ZC-CFTAs) and two grounded capacitors is proposed. The circuit structure has one low-impedance current input and three high-impedance current outputs and enables realizing lowpass, bandpass and highpass current responses simultaneously. The bandstop and allpass responses can also be obtained by connecting appropriate output currents directly without additional devices. The proposed filter is capable of providing an independent current-control of the natural angular frequency (<img src='http://www.niscair.res.in/jinfo/Omega-knot.gif' border=0>) and quality factor (<i>Q</i>) through the transconductance of the ZC-CFTA. Moreover, high-<i>Q</i> value filter can be realized by simply tuning the ratio of ZC-CFTA’s transconductance. To support the theoretical results, the properties of the presented filter using CMOS ZC-CFTA have been verified by simulation results.

Date	2011-11-30T12:05:24Z 2011-11-30T12:05:24Z 2011-12

Type	Article

Identifier	0975-1041 (Online); 0019-5596 (Print) http://hdl.handle.net/123456789/13128

Language	en_US

Rights	<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>

Publisher	NISCAIR-CSIR, India

Source	IJPAP Vol.49(12) [December 2011]