Abstract
The paper presents a new voltage-mode multifunction filter. The proposed filter employs single modified fully differential second generation current conveyor (FDCCII), two grounded capacitors, and three resistors. The proposed circuit enjoys the employment of two grounded capacitors (attractive for absorbing shunt parasitic capacitance and ideal for IC implementation). The proposed circuit provides all five generic filter responses (low pass (LP), high pass (HP), band pass (BP), notch (NH), and all pass (AP) filter responses) simultaneously with single input. The novel proposed filter has low active and passive sensitivities. A number of time domain and frequency domain simulation results depicted through PSPICE using 0.18 µm TSMC process parameters are included to validate the theory. The proposed circuit is expected to enhance the existing knowledge on the subject.
Highlights
Analog filters are the basic building blocks and widely used for continuous-time signal processing
Applications of analog filters employing current-mode active elements extend over a large number of areas [1,2,3,4,5]
A single input and multioutputs (SIMO) circuit configuration reported in [6] employs five current feedback amplifiers (CFAs), two grounded capacitors, and six resistors
Summary
Analog filters are the basic building blocks and widely used for continuous-time signal processing. A SIMO circuit configuration reported in [6] employs five current feedback amplifiers (CFAs), two grounded capacitors, and six resistors It realizes all the standard filter functions, namely, low pass (LP), band pass (BP), high pass (HP), notch (NH), and all pass (AP), simultaneously, and enjoys the features of using only grounded capacitors and orthogonal control between the resonance angular frequency and quality factor. The first universal filter employs three DVCCs together with two grounded capacitors and three grounded resistors and provides five outputs with single input but it requires matching condition to realize all the generic filter responses. Numerous voltage-mode biquadratic filters using current conveyors are presented [11,12,13,14,15,16,17,18] All of these reported filters cannot realize five filtering responses simultaneously. The proposed circuit of multifunction filter enjoys the features of minimum number of active and passive components and no requirement of component choice except for to realize all pass filter and low active and passive sensitivities
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