A robust digitally programmable and reconfigurable monolithic filter structure

Abstract

A completely programmable and reconfigurable digitally controllable active structure is presented. A specific implementation, which has over three decades of adjustment range and is capable of realizing any even-order filter function of up to sixth-order, was fabricated and tested. The filter operates over the 1-kHz to 1-MHz frequency range. Experimental results that confirm the reconfigurability and programmable characteristics of this structure are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>