Abstract
Abstract A new second-order lowpass active filter, based on the single pole roll-off characteristics of the operational amplifier, with only one operational amplitier and a single external capacitor is presented. Independent control of centre frequency, frequency selectivity and passband gain by a single resistor is possible with this design. The filter has low sensitivity to all circuit active and passive parameters and is suitable for low-medium-high Q factor operations over a wide range of frequencies. The filter is suitable for integration.
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