A filter that uses an amplifier in addition to reactive components to pass or reject selected frequencies.
A filter that employs active devices such as transistors or operational amplifiers in combination with R, L, and elements.
a filter that incorporates active components, usually as amplifiers, so that it more closely approximates an ideal filter
Low-pass, band-pass, or high-pass filter composed of active components, therefore amplifying the signal.
An active filter is one that uses active devices such as operational amplifiers to synthesize the filter response function. This technique has an advantage at high speeds because the need for inductors is eliminated.te
A frequency-selective circuit consisting of active devices such as transistors or op-amps.
An active filter is a type of analog electronic filter, distinguished by the use of one or more active components i.e. voltage amplifiers or buffer amplifiers. Typically this will be a vacuum tube, transistor or operational amplifier.