Diversity receiver front end system with post-amplifier filters
First Claim
1. A receiving system comprising:
- a controller configured to selectively activate one or more of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer;
a plurality of amplifiers, each one of the plurality of amplifiers disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier;
a plurality of pre-amplifier bandpass filters, individual pre-amplifier bandpass filters disposed along a corresponding path of the plurality of paths at an input of a corresponding amplifier of the plurality of amplifiers, individual pre-amplifier bandpass filters configured to filter a signal received at the pre-amplifier bandpass filter to a respective frequency band resulting in out-of-band noise that is amplified by the corresponding amplifier; and
a plurality of post-amplifier bandpass filters, individual post-amplifier bandpass filters disposed along a corresponding path of the plurality of paths at an output of a corresponding amplifier of the plurality of amplifiers and configured to filter a signal received at the post-amplifier bandpass filter to a respective frequency band and to reduce the out-of-band noise amplified by the corresponding amplifier, an individual pre-amplifier bandpass filter of the plurality of pre-amplifer bandpass filters disposed along a first path of the plurality of paths phase-shifts a signal by a first phase shift and an individual post-amplifier bandpass filter of the plurality of post-amplifer bandpass filters disposed along the first path phase-shifts the signal by a second phase shift that is opposite to the first phase shift.
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Accused Products
Abstract
Diversity receiver front end system with post-amplifier filters. A receiving system can include a controller configured to selectively activate one or more of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer. 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 include a first plurality of bandpass filters. Each one of the first plurality of bandpass filters can be disposed along a corresponding one of the plurality of paths at an output of a corresponding one of the plurality of amplifiers and can be configured to filter a signal received at the bandpass filter to a respective frequency band.
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Citations
19 Claims
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1. A receiving system comprising:
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a controller configured to selectively activate one or more of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer; a plurality of amplifiers, each one of the plurality of amplifiers disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier; a plurality of pre-amplifier bandpass filters, individual pre-amplifier bandpass filters disposed along a corresponding path of the plurality of paths at an input of a corresponding amplifier of the plurality of amplifiers, individual pre-amplifier bandpass filters configured to filter a signal received at the pre-amplifier bandpass filter to a respective frequency band resulting in out-of-band noise that is amplified by the corresponding amplifier; and a plurality of post-amplifier bandpass filters, individual post-amplifier bandpass filters disposed along a corresponding path of the plurality of paths at an output of a corresponding amplifier of the plurality of amplifiers and configured to filter a signal received at the post-amplifier bandpass filter to a respective frequency band and to reduce the out-of-band noise amplified by the corresponding amplifier, an individual pre-amplifier bandpass filter of the plurality of pre-amplifer bandpass filters disposed along a first path of the plurality of paths phase-shifts a signal by a first phase shift and an individual post-amplifier bandpass filter of the plurality of post-amplifer bandpass filters disposed along the first path phase-shifts the signal by a second phase shift that is opposite to the first phase shift. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radio-frequency (RF) module comprising:
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a packaging substrate configured to receive a plurality of components; and a receiving system implemented on the packaging substrate, the receiving system including a controller configured to selectively activate one or more of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer, a plurality of amplifiers, each one of the plurality of amplifiers disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier, a first plurality of bandpass filters, each one of the first plurality of bandpass filters disposed along a corresponding one of the plurality of paths at an output of a corresponding one of the plurality of amplifiers and configured to filter a signal received at the bandpass filter to a respective frequency band, and a second plurality of bandpass filters, each one of the second plurality of bandpass filters disposed along a corresponding one of the plurality of paths at an input of a corresponding one of the plurality of amplifiers and configured to filter a signal received at the bandpass filter to a respective frequency band resulting in out-of-band noise that is amplified by the corresponding amplifier and that is reduced by a corresponding bandpass filter of the first plurality of bandpass filters, a first bandpass filter of the first plurality of bandpass filters disposed along a first path of the plurality of paths phase-shifts a signal by a first phase shift and a second bandpass filter of the second plurality of bandpass filters disposed along the first path phase-shifts the signal by a second phase shift that is opposite to the first phase shift. - View Dependent Claims (14, 15, 16)
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17. A wireless device comprising:
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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 controller configured to selectively activate one or more of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer, a plurality of amplifiers, each one of the plurality of amplifiers disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier, a first plurality of bandpass filters, each one of the first plurality of bandpass filters disposed along a corresponding one of the plurality of paths at an amplifier output of a corresponding one of the plurality of amplifiers and configured to filter a signal received at the bandpass filter to a respective frequency band, and a second plurality of bandpass filters, each one of the second plurality of bandpass filters disposed along a corresponding one of the plurality of paths at an input of a corresponding one of the plurality of amplifiers and configured to filter a signal received at the bandpass filter to a respective frequency band resulting in out-of-band noise that is amplified by the corresponding amplifier and that is reduced by a corresponding bandpass filter of the first plurality of bandpass filters, a first bandpass filter of the first plurality of bandpass filters disposed along a first path of the plurality of paths phase-shifts a signal by a first phase shift and a second bandpass filter of the second plurality of bandpass filters disposed along the first path phase-shifts the signal by a second phase shift that is opposite to the first phase shift; and a communications module configured to receive a processed version of the first RF signal from the output of the second multiplexer via a transmission line and generate data bits based on the processed version of the first RF signal. - View Dependent Claims (18, 19)
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Specification