Patent ID: 7181184

Claim:
A method of using at least one filter to receive signals from an antenna by changing filtering characteristics, said method comprising: changing filtering characteristics on a main signal path as a function of at least one amplitude on another signal path ( 18 ) coupled to the main signal path and a power level on the main signal path where the main signal path and the other signal path have a frequency band of operation and where said amplitude is an adjacent band relative to the frequency band of operation; receiving analog signals on said main signal path; producing a replica of said analog signals on the other signal path where the other signal path is a band edge detection path; dividing said analog signals on said band edge detection path onto an upper edge detection path and a lower edge detection path; producing an upper edge amplitude for said analog signals at an upper edge relative to said frequency band of operation on said upper edge detection path and a lower edge amplitude for said analog signals at a lower edge relative to said frequency band of operation on said lower edge detection path; and detecting a power level of the signal on the main signal path.