Patent ID: 6195563
Filing Date: 2001-02-27
Classification: H03D,H04B

Abstract:
A radio frequency receiver operable in a first mode and a second mode, the first mode being a terrestrial mode in which the receiver operates in a terrestrial network, the second mode being a satellite mode in which the receiver operates in a satellite network, the first and second modes corresponding respectively to signals operating at different frequencies and having different channel structures, the radio frequency receiver comprising:a first front-end RF stage for receiving a terrestrial signal of the terrestrial network and providing a first output signal with a characteristic of the terrestrial signal;a second front-end RF stage for receiving a satellite signal of the satellite network and providing a second output signal with a characteristic of the satellite signal;a common RF stage including an input for receiving either the first output signal or the second output signal and including mixing circuitry for frequency down-converting the first and second output signal to enable subsequent decoding;a switch for selectively coupling either said first output signal or said second output signal to said common RF stage; andmeans for substantially equalizing a frequency of said first output signal with a frequency of said second output signal, wherein said switch is located between said equalizing means and said common RF stage, said equalizing means providing substantial equalization between the frequencies of said first and said second output signals before application of said first and said second output signals to said switch.