Patent ID: 8072297
Filing Date: 2011-12-06
Classification: H01P,H03H

Abstract:
1. A controllable filter arrangement having a controllable frequency response between an input and an output, the controllable filter arrangement comprising: a first filter connected between the input and the output and comprising a first voltage controlled device having an impedance responsive to a first device control signal to form a filter element of the first filter at a first device active impedance; and a second filter connected between the input and the output and comprising a second voltage controlled device having an impedance responsive to a second device control signal to form a filter element of the second filter at a second device active impedance, wherein at least one of the first voltage controlled device and the second voltage controlled device is a voltage variable inductor (VVI); the controllable filter arrangement having a first frequency response in accordance with the first filter when the first voltage device has the first device active impedance and the second voltage controlled device has second device inactive impedance higher than the second device active impedance; and the controllable filter arrangement having a second frequency response in accordance with the second filter when the second voltage device has the second device active impedance and the first voltage controlled device has first device inactive impedance higher than the first device active impedance.