1995•Electronics LettersRequires access

Universal filter using two current-feedback amplifiers

S.-I. Liu

Abstract

A new universal filter using two current-feedback amplifiers is presented. This filter can realise lowpass, bandpass, highpass, notch and allpass filters from the same configuration. It has the following features: orthogonal control of the natural frequency and quality factor by grounded resistors, easy conversion into a voltage-controlled filter, minimum active components, without match components except for allpass applications, low active and passive sensitivities, and cascadability. Experimental results that confirm the theoretical analyses are obtained.

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Available abstract

Key concepts: All-pass filter, High-pass filter, Active filter, Voltage-controlled filter, Band-pass filter, Low-pass filter, Electronic engineering, Filter (signal processing)