Electronically tunable universal biquad using a single active component

Abstract

In this work, a novel voltage-mode (VM) single-input four-output universal filter topology is presented. The proposed structure uses two resistors, two capacitors and only one voltage differencing current conveyor (VDCC) and generates all biquadratic filtering functions namely: low-pass (LP), band-pass (BP), high-pass (HP) and band-reject (BR). The quality factor and natural frequency of the filter can be adjusted electronically without changing the values of the passive components. Moreover, the circuit does not require any condition of component matching and has a good sensitivity performance with respect to tracking errors of passive components and the active parameter. PSpice simulation results confirm the results of the theoretical analysis.

Keywords

Digital biquad filter Resistor Capacitor Electronic component Band-pass filter Current conveyor Computer science Topology (electrical circuits) Component (thermodynamics) Sensitivity (control systems) Filter (signal processing) Voltage Electronic engineering High-pass filter Low-pass filter Active filter Control theory (sociology) Engineering Electrical engineering Physics

Subject Areas

Analog and Mixed-Signal Circuit Design ·Biomedical Engineering ·Physical Sciences

Advancements in PLL and VCO Technologies ·Electrical and Electronic Engineering ·Physical Sciences

CCD and CMOS Imaging Sensors ·Electrical and Electronic Engineering ·Physical Sciences

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Electronically tunable universal biquad using a single active component

Abstract

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