Loading...
Compact VDTA-based current-mode electronically tunable universal filters using grounded capacitors
Author(s)
Satansup, Jetsdaporn
Date Issued
January 1, 2014
Type
Article
Abstract
This paper presents a compact current-mode three-input single-output (TISO) type universal filter. Only one voltage differencing transconductance amplifier (VDTA) and two grounded capacitors are employed in the proposed filter. The circuit can realize lowpass, bandpass, highpass, bandstop and allpass biquadratic filter outputs by connecting the appropriate inputs, and offers electronic control of the natural angular frequency (ω0) and quality factor (Q) by means of adjusting the transconductance gain of the VDTA. In addition, by slight modification of the proposed scheme, another more useful TISO construction with orthogonal ω0-Q tuning has been obtained. Both the discussed universal filters have been shown to have low incremental active and passive sensitivities. To demonstrate the performances of the filters and verify the theoretical analysis, computer simulations are accomplished with the PSPICE program. © 2014 Elsevier Ltd.
Citation
Microelectronics Journal, 45(6), 613-618, 2014