Patent ID: 6940365
Filing Date: 2005-09-06
Classification: H03F,H03H,H03J

Abstract:
1. A tunable discrete LC filter comprising: an input for receiving an input signal for processing, said input signal comprising a plurality of frequencies; control input for receiving information to select at least one band of frequencies for processing; first inductor bank for filtering a first band of frequencies; second inductor bank for filtering a second band of frequencies; and switch circuit comprising a switching element and an isolation element, coupling said input signal to said first inductor bank and said second inductor bank, said switching element comprising a series resistance and said isolation element for isolating said series resistance from said first inductor bank or said second inductor bank so as to enhance a O factor for said LC filter, said switch circuit for selecting said first inductor bank if said first band of frequencies is selected, and for selecting said second inductor bank if said second band of frequencies is selected.