Patent ID: 7239858
Filing Date: 2007-07-03
Classification: H04B

Abstract:
1. A switching device for routing an RF signal based on a control signal from a controller, comprising: first, second, and third filter networks, a switch element coupled to the controller and between the first filter network and the second and third filter networks and configured to connect either the second or the third filter network to the first filter network based on the control signal; wherein parasitic components associated with the switch element and the first, second and third filter networks are integrated into one low-pass filter prototype structure, and the first, second and third filter networks each comprises at least two serially connected inductors coupled between an input and an output of the filter network, a first capacitor coupled between the input and a ground terminal, and a second capacitor coupled between a circuit node in the filter network and the ground terminal, and wherein at least one capacitance value in each of the first, second and third filter networks is selected based on the values of the parasitic components in the switch element.