RECONFIGURABLE RADIO FREQUENCY CIRCUITS AND METHODS OF RECEIVING
First Claim
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, andwherein 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.
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Accused Products
Abstract
A reconfigurable radio frequency circuit is arranged for receiving at least one carrier in a wireless communications terminal 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, and each of the plurality of operating frequency bands occupying a part of a first or a second frequency range. The circuit includes a combiner for connecting the output of a first receiver filter at a first operating frequency band within the first frequency range to the input of an amplifier and for connecting the output of a second receiver filter at a second operating frequency band within the second frequency range to the input of the amplifier. The amplifier has a selectable operating frequency range, the operating frequency range being selectable at least between the first frequency range and the second frequency range.
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Citations
20 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of receiving at least one carrier in a wireless communications terminal, the wireless communications terminal being arranged to receive at least two carriers, each of said 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 method comprising:
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filtering received signals comprising the at least one carrier using a plurality of receiver filters, including at least a first receiver filter, a second receiver filter, a third receiver filter and a fourth receiver filter, wherein the first receiver filter is arranged to pass signals in a first operating band within the first frequency range, the second receiver filter is arranged to pass signals in a second operating band within the second frequency range, the third receiver filter is arranged to pass signals within a third operating frequency band, and the fourth receiver filter is arranged to pass signals within a fourth operating frequency band; connecting the output of the first receiver filter to a signal path leading to the input of a first tuneable amplifier, connecting the output of the second receiver filter to a signal path leading to the input of the first tuneable amplifier, connecting the output of the third receiver filter to a signal path leading to the input of a second tuneable amplifier and connecting the output of the fourth receiver filter to a signal path leading to the input of the second tuneable amplifier; and selecting the operating frequency range of the first tuneable amplifier to include the operating frequency band of the at least one carrier, the operating frequency range of the first tuneable amplifier being selectable between at least the first and the second frequency range and the operating frequency range of the second tuneable amplifier between at least the first and second frequency range, 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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification