Multi-mode radio frequency front end module
A radio frequency (RF) front end circuit for connecting an antenna to a transceiver having multiple operating modes is disclosed. The circuit has a first transmit input receptive to signals of a first operating mode and a second operating mode from the transceiver. There is also a second transmit input receptive to signals of a third operating mode from the transceiver. The circuit has a first power amplifier for the first and second operating modes, a second power amplifier for the first operating mode, and a third power amplifier for the second and third operating mode. A first switch network selectively interconnects the first transmit input to a one of the second and third power amplifiers.
1. A radio frequency (RF) front end circuit for connecting an antenna to a transceiver having a first operating mode, a second operating mode, and a third operating mode, comprising:
a first set of transmit ports receptive to signals of the first operating mode and the second operating mode from the transceiver;
a second set of transmit ports receptive to signals of the third operating mode from the transceiver;
a first set of power amplifiers for the first operating mode;
a second set of power amplifiers for the second and third operating modes;
a first switch selectively interconnecting a one of the first set of transmit ports to a one of the first set of power amplifiers and a one of the second set of power amplifiers;
a second switch selectively interconnecting a different one of the first set of transmit ports to a different one of the first set of power amplifiers and a different one of the second set of power amplifiers;
a multi-position switch selectively interconnecting the antenna to a single one of the first set of power amplifiers and the second set of power amplifiers;
a first set of receive ports relaying signals of the first operating mode and the second operating mode received from the antenna; and
a second set of receive ports relaying signals of the third operating mode received from the antenna.
2. The front end circuit of claim 1 , wherein the multi-position switch further selectively interconnects the antenna to a single one of the first set of receive ports and the second set of receive ports.
3. The front end circuit of claim 1 , further comprising:
diplexers coupling each output of the second set of power amplifiers and each of the second set of receive ports to the antenna.
4. The front end circuit of claim 3 , further comprising:
a first diplexer switch selectively interconnecting one of the output of a first one of the second set of power amplifiers and a first one of the diplexers to the multi-position switch; and
a second diplexer switch selectively interconnecting the output of a second one of the second set of power amplifiers and a second one of the diplexers to the multi-position switch.
5. The front end circuit of claim 4 , wherein the diplexer switches, the first switch, the second switch, and the second set of power amplifiers is fabricated on a single die.
6. The front end circuit of claim 3 , further comprising:
a first output switch selectively interconnecting a first one of the second set of power amplifiers to one of the diplexers; and
a second output switch selectively interconnecting a second one of the second set of power amplifiers to an other one of the diplexers;
wherein the first set of power amplifiers are selectively interconnected to the antenna by a respective one of the first and second output switches.