Diversity receiver front end system with amplifier phase compensation

• US 9,667,324 B2
• Filed: 06/14/2016
• Issued: 05/30/2017
• Est. Priority Date: 10/31/2014
• Status: Active Grant

• Current Assignee: Skyworks Solutions Incorporated
• Original Assignee: Skyworks Solutions Incorporated
• Inventors: Wloczysiak, Stephane Richard Marie
• Primary Examiner(s): HA, DAC V
• Application Number:
  US15/181,572
• Publication Number:
  US 20170026090A1
• Time in Patent Office: 350 Days
• CPC Class Codes: H03F 1/0205 in transistor amplifiers
• CPC Class Codes: H03F 1/56 Modifications of input or output impedances, not otherwise provided for
• CPC Class Codes: H03F 2200/111 the amplifier being a dual or triple band amplifier, e.g. 900 and 1800 MHz, e.g. switched or not switched, simultaneously or not
• CPC Class Codes: H03F 2200/387 A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier
• CPC Class Codes: H03F 2200/411 the output amplifying stage of an amplifier comprising two power stages
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2203/21106 An input signal being distributed in parallel over the inputs of a plurality of power amplifiers
• CPC Class Codes: H03F 2203/21112 A filter circuit being added at the input of a power amplifier stage
• CPC Class Codes: H03F 2203/7209 the gated amplifier being switched from a first band to a second band
• CPC Class Codes: H03F 3/19 with semiconductor devices only
• CPC Class Codes: H03F 3/195 in integrated circuits
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03F 3/245 with semiconductor devices only
• CPC Class Codes: H03F 3/72 Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
• CPC Class Codes: H04B 1/16 Circuits
• CPC Class Codes: H04B 1/18 Input circuits, e.g. for coupling to an antenna or a transmission line coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H
• CPC Class Codes: H04B 7/01 Reducing phase shift
• CPC Class Codes: H04B 7/08 at the receiving station
• CPC Class Codes: H04B 7/0825 with main and with auxiliary or diversity antennas

Abstract

Diversity receiver front end system with amplifier phase compensation. A receiving system can include 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. The receiving system can include 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. The receiving system can include a first phase-shift component disposed along the first path and configured to phase-shift the second frequency band of a signal passing through the first phase-shift component based on a phase-shift caused by the first amplifier at the second frequency band.

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; and

a first phase-shift component disposed along the first path and configured to phase-shift the second frequency band of a signal passing through the first phase-shift component based on a phase-shift caused by the first amplifier at the second frequency band.

2. The receiving system of claim 1 further comprising a second phase-shift component disposed along the second path and configured to phase-shift the first frequency band of a signal passing through the second phase-shift component based on a phase-shift caused by the second amplifier at the first frequency band.

3. The receiving system of claim 1 wherein the first phase-shift component is further configured to phase-shift a third frequency band of the signal passing through the first phase-shift component based on a phase-shift caused by the first amplifier at the third frequency band.

4. The receiving system of claim 1 wherein the first phase-shift component is configured to phase-shift the second frequency band of the signal passing through the first phase-shift component based on a phase-shift caused by reverse propagation through the first amplifier and forward propagation through the first amplifier.

5. The receiving system of claim 1 further comprising a multiplexer configured to split an input signal received at the input of the receiving system into a first signal at a first frequency band propagated along the first path and a second signal at a second frequency band propagated along the second path.

6. The receiving system of claim 5 wherein the first phase-shift component is configured to phase-shift the second frequency band of the signal passing through the first phase-shift component further based on a phase-shift caused by the multiplexer at the second frequency band.

7. The receiving system of claim 5 wherein the first phase-shift component is integrated into a first impedance matching component disposed between the multiplexer and the first amplifier.

8. The receiving system of claim 7 wherein the first impedance matching component has an impedance selected based on the first frequency band to reduce at least one of a noise figure of the first path for the first frequency band or increase a gain of the first path for the first frequency band.

9. The receiving system of claim 8 wherein the first impedance matching component has 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.

10. The receiving system of claim 5 further comprising a signal combiner configured to combine the first signal and the second signal.

11. The receiving system of claim 10 wherein first phase-shift component is disposed between the signal combiner and the first amplifier.

12. The receiving system of claim 1 wherein the first phase-shift component is configured to phase-shift the second frequency band of the signal passing through the first phase-shift component such that an initial signal propagated along the second path and a reflected signal propagated along the first path are at least partially in-phase.

13. The receiving system of claim 12 wherein the first phase-shift component is configured to phase-shift the second frequency band of the signal passing through the first phase-shift component such that such that an amplitude of a sum of initial signal and the reflected signal is greater than an amplitude of the initial signal.

14. The receiving system of claim 12 wherein the first phase-shift component is configured to phase-shift the second frequency band of the signal passing through the first phase-shift component such that the initial signal and the reflected signal have a phase difference of an integer multiple of 360 degrees.

15. The receiving system of claim 1 wherein the first phase-shift component is a tunable phase-shift component configured to phase-shift the second frequency band of the signal passing through the first phase-shift component an amount controlled by a phase-shift tuning signal received from a controller.

16. The receiving system of claim 1 wherein the first phase-shift component is a passive circuit.

17. 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 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 phase-shift component disposed along the first path and configured to phase-shift the second frequency band of a signal passing through the first phase-shift component based on a phase-shift caused by the first amplifier at the second frequency band.

18. The RF module of claim 17 wherein the RF module is a diversity receiver front-end module (FEM).

19. 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 phase-shift component disposed along the first path and configured to phase-shift the second frequency band of a signal passing through the first phase-shift component based on a phase-shift caused by the first amplifier at the second frequency band; and

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

20. The wireless device of claim 19 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 transceiver 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.