Patent ID: 9154171
Filing Date: 2015-10-06
Classification: H04B

Abstract:
1. A reconfigurable radio frequency circuit for receiving at least one carrier in a wireless communications terminal, the wireless communications terminal being arranged to receive at least two carriers, each of the two carriers being transmitted in a different one of a plurality of operating frequency bands, each of the plurality of operating frequency bands occupying a part of a first or a second frequency range, the second frequency range being different from the first frequency range, the circuit comprising: a plurality of receiver filters, including at least a first receiver filter arranged to pass carrier frequencies within a first operating frequency band within the first frequency range, a second receiver filter arranged pass second carrier frequencies within a second operating frequency band within the second frequency range, a third receiver filter arranged to pass carrier frequencies within a third operating frequency band, and a fourth receiver filter arranged to pass carrier frequencies within a fourth operating frequency band; a first combiner for connecting the output of the first receiver filter at the first operating frequency band to a signal path leading to the input of a first amplifier and for connecting the output of the second receiver filter at the second operating frequency band to a signal path leading to the input of the first amplifier; and a second combiner for connecting the output of the third receiver filter at the third operating frequency band to a signal path leading to the input of a second amplifier and for connecting the output of the fourth receiver filter at the fourth operating frequency band to a signal path leading to the input of the second amplifier, wherein the first amplifier has an operating frequency range that is selectable at least between the first frequency range and the second frequency range, and the second amplifier has an operating frequency range that is selectable at least between the first frequency range and the second frequency range, and wherein at least two of said first, second, third and fourth receiver filters are arranged to pass frequency operating bands that may be used together and are arranged to be connected to a different one of said first and second amplifiers.