Diversity receiver front end system with impedance matching components
First Claim
1. A receiving system comprising:
- a first amplifier disposed along a first path, corresponding to a first frequency band, between an input of the receiving system and an output of the receiving system;
a second amplifier disposed along a second path, corresponding to a second frequency band, between the input of the receiving system and the output of the receiving system;
a controller configured to generate a first impedance tuning signal in response to a first band select signal indicating an in-band frequency band as the first frequency band and a first out-of-band frequency band as the second frequency band and to generate a second impedance tuning signal in response to a second band select signal indicating the in-band frequency band as the first frequency band and a second out-of-band frequency band as the second frequency band; and
a first impedance matching circuit disposed along the first path and having an impedance selected based on the second frequency band to reduce at least one of a noise figure of the first path for the second frequency band or a gain of the first path for the second frequency band, the first impedance matching circuit having a tunable impedance matching circuit with an impedance selected by the first impedance tuning signal received from the controller.
1 Assignment
0 Petitions
Accused Products
Abstract
Diversity receiver front end system with impedance matching components. A receiving system can include a controller configured to selectively activate one or more of a plurality of paths between an input of the receiving system and an output of the receiving system. The receiving system can further include a plurality of amplifiers. Each one of the plurality of amplifiers can be disposed along a corresponding one of the plurality of paths and can be configured to amplify a signal received at the amplifier. The receiving system can further include a plurality of impedance matching components. Each one of the plurality of impedance matching components can be disposed along a corresponding one of the plurality of paths and can be configured to reduce at least one of an out-of-band noise figure or an out-of-band gain of the one of the plurality of paths.
33 Citations
19 Claims
-
1. A receiving system comprising:
-
a first amplifier disposed along a first path, corresponding to a first frequency band, between an input of the receiving system and an output of the receiving system; a second amplifier disposed along a second path, corresponding to a second frequency band, between the input of the receiving system and the output of the receiving system; a controller configured to generate a first impedance tuning signal in response to a first band select signal indicating an in-band frequency band as the first frequency band and a first out-of-band frequency band as the second frequency band and to generate a second impedance tuning signal in response to a second band select signal indicating the in-band frequency band as the first frequency band and a second out-of-band frequency band as the second frequency band; and a first impedance matching circuit disposed along the first path and having an impedance selected based on the second frequency band to reduce at least one of a noise figure of the first path for the second frequency band or a gain of the first path for the second frequency band, the first impedance matching circuit having a tunable impedance matching circuit with an impedance selected by the first impedance tuning signal received from the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A radio-frequency (RF) module comprising:
-
a packaging substrate configured to receive a plurality of components; a receiving system implemented on the packaging substrate, the receiving system including a first amplifier disposed along a first path, corresponding to a first frequency band, between an input of the receiving system and an output of the receiving system, a second amplifier disposed along a second path, corresponding to a second frequency band, between the input of the receiving system and the output of the receiving system, and a first impedance matching circuit disposed along the first path and having an impedance selected based on the second frequency band to reduce at least one of a noise figure of the first path for the second frequency band or a gain of the first path for the second frequency band; and a controller configured to generate, in response to a first band select signal indicating an in-band frequency band as the first frequency band and a first out-of-band frequency band as the second frequency band, a first impedance tuning signal to tune the first impedance matching circuit to a first impedance and to generate, in response to a second band select signal indicating the in-band frequency band as the first frequency band and a second out-of-band frequency band as the second frequency band, a second impedance tuning signal to tune the first impedance matching circuit to a second impedance. - View Dependent Claims (14, 15, 16)
-
-
17. A wireless device comprising:
-
a first antenna configured to receive a first radio-frequency (RF) signal; a first front-end module (FEM) in communication with the first antenna, the first FEM including a packaging substrate configured to receive a plurality of components, the first FEM further including a receiving system implemented on the packaging substrate, the receiving system including a first amplifier disposed along a first path, corresponding to a first frequency band, between an input of the receiving system and an output of the receiving system, a second amplifier disposed along a second path, corresponding to a second frequency band, between the input of the receiving system and the output of the receiving system, and a first impedance matching circuit disposed along the first path and having an impedance selected based on the second frequency band to reduce at least one of a noise figure of the first path for the second frequency band or a gain of the first path for the second frequency band; a transceiver configured to receive a processed version of the first RF signal from the output of the first FEM via a transmission line and generate data bits based on the processed version of the first RF signal; and a controller configured to generate, in response to a first band select signal indicating an in-band frequency band as the first frequency band and a first out-of-band frequency band as the second frequency band, a first impedance tuning signal to tune the first impedance matching circuit to a first impedance and to generate, in response to a second band select signal indicating the in-band frequency band as the first frequency band and a second out-of-band frequency band as the second frequency band, a second impedance tuning signal to tune the first impedance matching circuit to a second impedance. - View Dependent Claims (18, 19)
-
Specification