Patent ID: 7885624

Claim:
A communication system with variable filter bandwidth comprises: a first mixer circuit disposed within a high frequency integrated circuit having input ports configured to receive a first communication signal and shift the frequency range of said communication signal to a first frequency range, wherein said first mixer circuit comprises a first mixer; a second mixer circuit disposed within said high frequency integrated circuit having input ports configured to receive said first communication signal and shift the frequency range of said first communication signal to a second frequency range, wherein said second mixer circuit comprises a second mixer that is distinct from said first mixer; an amplifier coupled to said first and second mixer circuits for providing said first communication signal to said first and second mixer circuits; an activation circuit coupled to the first and second mixer circuits so as to provide an activation signal that selectively activates any one of the mixer circuits; first and second filter circuits each configured to receive a signal from said first and second mixer circuits, when a corresponding one of said mixer circuits is activated and to provide a signal to a low frequency integrated circuit; and wherein when one of said mixer circuits is activated, the remaining mixer circuit does not generate an output voltage signal.