Title :
Constraint removal for Huelsman´s equal-valued-capacitor active RC circuit
Author_Institution :
Technological University of Eindhoven, Department of Electrical Engineering, Eindhoven, Netherlands
Abstract :
Making use of the well known Hurwitz conditions, it is shown that Huelsman´s equal-valued-capacitor active RC circuit may realise not merely the Butterworth maximally flat characteristic, but any kind of 3rd-order lowpass transfer function, regardless of the precise location of the three left-halfplane poles.
Keywords :
active filters; capacitors; transfer functions; Butterworth type filters; Huelsman equal valued capacitor; Hurwitz conditions; active filters; active resistance capacitance circuit; transfer functions;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19710304
