MULTI-MODE MULTI-BAND TRANSCEIVER, RADIO FREQUENCY FRONT-END CIRCUIT AND RADIO FREQUENCY SYSTEM USING THE SAME
First Claim
1. A radio frequency (RF) system, comprising:
- a transceiver having a signal transmitting port, which selectively transmits a first RF signal corresponding to a first band or a second RF signal corresponding to a second band; and
an RF front-end circuit coupled to the transceiver, wherein the RF front-end circuit comprises;
a transmission path switch used for electrically coupling the signal transmitting port to a selected signal transmission path of a plurality of signal transmission paths; and
an antenna switch coupled to the signal transmission paths for electrically coupling the selected signal transmission path to an antenna module.
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Accused Products
Abstract
A radio frequency (RF) system including a transceiver and an RF front-end circuit is provided. The transceiver has a signal transmitting port, which selectively transmits a first RF signal or a second RF signal, wherein the first RF signal corresponds to a first communication mode and a first band, and the second RF signal corresponds to a second communication mode and a second band. The RF front-end circuit is coupled to the transceiver, and includes a transmission path switch and an antenna switch. The transmission path switch electrically couples the signal transmitting port to a selected signal transmission path of a plurality of signal transmission paths. The antenna switch is coupled to the signal transmission paths, and electrically couples the selected signal transmission path to the antenna module.
35 Citations
26 Claims
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1. A radio frequency (RF) system, comprising:
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a transceiver having a signal transmitting port, which selectively transmits a first RF signal corresponding to a first band or a second RF signal corresponding to a second band; and an RF front-end circuit coupled to the transceiver, wherein the RF front-end circuit comprises; a transmission path switch used for electrically coupling the signal transmitting port to a selected signal transmission path of a plurality of signal transmission paths; and an antenna switch coupled to the signal transmission paths for electrically coupling the selected signal transmission path to an antenna module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transceiver, comprising:
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a controller used for providing a frequency selection signal; and a drive amplifier controlled by the controller and coupled to a signal transmitting port of the transceiver, wherein the drive amplifier comprises; a frequency dependent load set comprising a plurality of frequency dependent loads; a band selector switched between the frequency dependent loads in response to the frequency selection signal; and an amplifier circuit coupled to the band selector and electrically coupled to one of the frequency dependent loads through the band selector, wherein when the amplifier circuit is coupled to a first frequency dependent load of the frequency dependent loads, the amplifier circuit outputs a first RF signal to the signal transmitting port;
when the amplifier circuit is coupled to a second frequency dependent load of the frequency dependent loads, the amplifier circuit outputs a second RF signal to the signal transmitting port. - View Dependent Claims (15, 16, 17, 18)
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19. An RF front-end circuit, comprising:
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a transmission path switch used for selectively and electrically coupling a signal transmitting port of a transceiver to one of a plurality of signal transmission paths; and an antenna switch coupled to the signal transmission paths for transmitting the signals coming from the signal transmission paths to an antenna module; wherein when the signal transmitting port transmits a first RF signal, the transmission path switch electrically couples the signal transmitting port to a first signal transmission path of the signal transmission paths to transmit the first RF signal to the antenna module; when the signal transmitting port transmits a second RF signal, the transmission path switch electrically couples the signal transmitting port to a second signal transmission path of the signal transmission paths for transmitting the second RF signal to the antenna module. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification