Diversity receiver front end system with post-amplifier filters

Patent metadata

Field	Value
Publication number	US-2016127025-A1
Application number	US-201514735482-A
Country	US
Kind code	A1
Filing date	Jun 10, 2015
Priority date	Oct 31, 2014
Publication date	May 5, 2016
Grant date	—

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.

First claim

What is claimed is:

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; and 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.

2 . The system of claim 1 further comprising 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.

3 . The system of claim 2 wherein one of the first plurality of bandpass filters disposed along a first path and one of the second plurality of bandpass filters disposed along the first path are complementary.

4 . The system of claim 3 wherein one of the bandpass filters disposed along the first path attenuates frequencies below a first frequency band more than frequencies above the first frequency band and another of the bandpass filters disposed along the first path attenuates frequencies above the first frequency band more than frequencies below the first frequency band.

5 . The system of claim 1 further comprising a transmission line coupled to the output of the second multiplexer and coupled to a downstream module including a downstream multiplexer.

6 . The system of claim 5 wherein the downstream module does not include a downstream bandpass filter.

7 . The system of claim 6 wherein the downstream multiplexer includes a sample switch.

8 . The system of claim 5 wherein the downstream module includes one or more downstream amplifiers.

9 . The system of claim 7 wherein a number of the one or more downstream amplifiers is less than a number of the plurality of amplifiers.

10 . The system of claim 1 wherein at least one of the plurality of amplifiers includes a low-noise amplifier.

11 . The system of claim 1 further comprising one or more tunable matching circuits disposed at one or more of the input of the first multiplexer and the output of the second multiplexer.

12 . The system of claim 1 wherein the controller is configured to selectively activate the one or more of the plurality of paths based on a band select signal received by the controller.

13 . The system of claim 1 wherein the controller is configured to selectively activate the one or more of the plurality of paths by transmitting a splitter control signal to the first multiplexer and a combiner control signal to the second multiplexer.

14 . A radio-frequency (RF) module comprising:
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, and 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.

15 . The RF module of claim 14 wherein the RF module is a diversity receiver front-end module (FEM).

16 . The RF module of claim 14 wherein the receiving system further includes 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.

17 . The RF module of claim 14 wherein the plurality of paths includes an off-module path including an off-module bandpass filter and one of the plurality of amplifiers.

18 . 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 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, and 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 communications module configured to receive a processed version of the first RF signal from the output via a transmission line and generate data bits based on the processed version of the first RF signal.

19 . The wireless device of claim 18 further comprising a second antenna configured to receive a second radio-frequency (RF) signal and a second FEM in communication with the second antenna, the communications module being configured to receive a processed version of the second RF signal from an output of the second FEM and generate the data bits based on the processed version of the second RF signal.

20 . The wireless device of claim 18 wherein the receiving system further includes 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.

Assignees

• Skyworks Solutions Inc

Inventors

• Wloczysiak Stephane Richard Marie

Classifications

• H04B1/0057

  using diplexing or multiplexing filters for selecting the desired band · CPC title

• H03F3/72

  Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal · CPC title

• H03F2200/451

  the amplifier being a radio frequency amplifier · CPC title

• H03F2200/171

  A filter circuit coupled to the output of an amplifier · CPC title

• H03F2203/7209

  the gated amplifier being switched from a first band to a second band · CPC title