Wireless transceiver with switch to reduce harmonic leakage
First Claim
1. A transmitter system comprising:
- a power amplification system including a first power amplifier configured to amplify a signal within a first set of frequency bands and a second power amplifier configured to amplify a signal within a second set of frequency bands;
a first band select switch having a plurality of output ports and an input port coupled to an output of the first power amplifier, the first band select switch configured to route a received signal from the output of the first power amplifier to one of the plurality of output ports corresponding to a frequency band of the first set of frequency bands;
a second band select switch having a plurality of output ports and an input port coupled to an output of the second power amplifier, the second band select switch configured to route a received signal from the output of the second power amplifier to one of the plurality of output ports corresponding to a frequency band of the second set of frequency bands;
a plurality of switches, individual switches being coupled between an output port of the second band select switch and a ground potential; and
a controller configured to, based on a band select signal indicating a first frequency band within the first set of frequency bands as a first transmission band and a second frequency band within the second set of frequency bands as a reception band but not a transmission band and a third frequency band within the second set of frequency bands as a second transmission band, enable the first power amplifier and the second power amplifier, to close a first switch of the plurality of switches corresponding to a harmonic of the first transmission band, and to open a second switch of the plurality of switches corresponding to the second transmission band in response to the band select signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein are wireless transceivers with switches to reduce harmonic leakage. In some embodiments, a transmitter system includes a power amplification system including a first power amplifier configured to amplify a signal at a first cellular frequency band and a second power amplifier configured to amplify a signal at a second cellular frequency band. The transmitter includes a switch coupled between an output of the second power amplifier and a ground potential. The transmitter includes a controller configured to, based on a band select signal, control the switch and selectively enable or disable each of the first power amplifier and the second power amplifier. Selective control of the switch can reduce harmonic leakage compared to a system that does not include the disclosed switches and controls.
-
Citations
20 Claims
-
1. A transmitter system comprising:
-
a power amplification system including a first power amplifier configured to amplify a signal within a first set of frequency bands and a second power amplifier configured to amplify a signal within a second set of frequency bands; a first band select switch having a plurality of output ports and an input port coupled to an output of the first power amplifier, the first band select switch configured to route a received signal from the output of the first power amplifier to one of the plurality of output ports corresponding to a frequency band of the first set of frequency bands; a second band select switch having a plurality of output ports and an input port coupled to an output of the second power amplifier, the second band select switch configured to route a received signal from the output of the second power amplifier to one of the plurality of output ports corresponding to a frequency band of the second set of frequency bands; a plurality of switches, individual switches being coupled between an output port of the second band select switch and a ground potential; and a controller configured to, based on a band select signal indicating a first frequency band within the first set of frequency bands as a first transmission band and a second frequency band within the second set of frequency bands as a reception band but not a transmission band and a third frequency band within the second set of frequency bands as a second transmission band, enable the first power amplifier and the second power amplifier, to close a first switch of the plurality of switches corresponding to a harmonic of the first transmission band, and to open a second switch of the plurality of switches corresponding to the second transmission band in response to the band select signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A radio-frequency (RF) module comprising:
-
a packaging substrate configured to receive a plurality of components; and a transmitter system implemented on the packaging substrate, the transmitter system including a power amplification system including a first power amplifier configured to amplify a signal within a first set of frequency bands and a second power amplifier configured to amplify a signal within a second set of frequency bands, a first band select switch having a plurality of output ports and an input port coupled to an output of the first power amplifier, the first band select switch configured to route a received signal from the output of the first power amplifier to one of the plurality of output ports corresponding to a frequency band of the first set of frequency bands, a second band select switch having a plurality of output ports and an input port coupled to an output of the second power amplifier, the second band select switch configured to route a received signal from the output of the second power amplifier to one of the plurality of output ports corresponding to a frequency band of the second set of frequency bands, a plurality of switches, individual switches being coupled between an output port of the second band select switch and a ground potential, and a controller configured to, based on a band select signal indicating a first frequency band within the first set of frequency bands as a first transmission band and a second frequency band within the second set of frequency bands as a reception band but not a transmission band and a third frequency band within the second set of frequency bands as a second transmission band, enable the first power amplifier and the second power amplifier, to close a first switch of the plurality of switches corresponding to a harmonic of the first transmission band, and to open a second switch of the plurality of switches corresponding to the second transmission band in response to the band select signal. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. A wireless device comprising:
-
a transceiver configured to generate a radio-frequency (RF) signal; a front-end module (FEM) in communication with the transceiver, the FEM including a packaging substrate configured to receive a plurality of components, the FEM further including a transmitter system implemented on the packaging substrate, the transmitter system including a power amplification system including a first power amplifier configured to amplify a signal within a first set of frequency bands and a second power amplifier configured to amplify a signal within a second set of frequency bands, a first band select switch having a plurality of output ports and an input port coupled to an output of the first power amplifier, the first band select switch configured to route a received signal from the output of the first power amplifier to one of the plurality of output ports corresponding to a frequency band of the first set of frequency bands, a second band select switch having a plurality of output ports and an input port coupled to an output of the second power amplifier, the second band select switch configured to route a received signal from the output of the second power amplifier to one of the plurality of output ports corresponding to a frequency band of the second set of frequency bands, a plurality of switches, individual switches being coupled between an output port of the second band select switch and a ground potential, and a controller configured to, based on a band select signal indicating a first frequency band within the first set of frequency bands as a first transmission band and a second frequency band within the second set of frequency bands as a reception band but not a transmission band and a third frequency band within the second set of frequency bands as a second transmission band, enable the first power amplifier and the second power amplifier, to close a first switch of the plurality of switches corresponding to a harmonic of the first transmission band, and to open a second switch of the plurality of switches corresponding to the second transmission band in response to the band select signal; and an antenna in communication with the FEM, the antenna configured to transmit an amplified version of the signal received from the transmitter system. - View Dependent Claims (20)
-
Specification