Reconnection-less Reconfigurable Filter and its Application into Adaptive Circuit

This paper presents special topology of a reconnection-less reconfigurable second-order filter. Its features of available transfer functions are unique, because none of the previously reported solutions provides similar features. Our concept is easily implementable thanks to the simple commercial active devices as shown in the paper. The design specifications and transfer responses are analyzed by PSpice simulations. Application example of the high-pass response with adjustable low-frequency stop-band attenuation in adaptive signal processing is shown. All results are following theoretical expectations.