Abstract
An active <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">RC</tex> filter design approach based on the simulation of an <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</tex> filter is proposed. In this approach, if node equations of an <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</tex> filter are given, an active <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">RC</tex> structure is obtained which is described by the same equations. Then, the technique to decrease the number of operational amplifiers (OA's) is considered. The effect of gain-bandwidth products of the OA's used and that of changes in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">RC</tex> elements are discussed. For the design example, a fifth-order bandpass filter was selected. The experimental result showed good agreement with the theory.
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