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Automatic impedance matching using true power information

A technology for power amplifiers and controllers, applied in power amplifiers, amplifier input/output impedance improvements, etc., can solve problems such as waveform distortion, violation of system specifications, and interference with wireless devices

Active Publication Date: 2016-04-06
SKYWORKS SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a power amplifier compresses a signal, the power amplifier output may no longer be linearly related to its input and the modulated waveform may become distorted
Additionally, the signal spectrum may change and begin to degrade such that the spectrum spreads into adjacent regions of the band and violates system specifications
Spectrum spread into adjacent channels may interfere with other wireless devices, thereby negatively impacting other wireless devices

Method used

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  • Automatic impedance matching using true power information
  • Automatic impedance matching using true power information
  • Automatic impedance matching using true power information

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Embodiment Construction

[0067] Headings, if any, are provided herein for convenience only and should not affect the scope or meaning of the claimed invention.

[0068] introduction

[0069] Many wireless devices include one or more linear power amplifiers. In some cases, a power amplifier receives a modulated waveform or signal that includes amplitude modulated content. In order for the power amplifier to accurately amplify the received signal prior to transmission, it is desirable to avoid compression of the signal. When a power amplifier goes into compression, the power amplifier output may no longer be linearly related to its output. Once the power amplifier starts to compress the signal and the device starts to go into saturation mode, the modulated waveform can become distorted which can lead to loss of information. Additionally, the signal spectrum may change and begin to degrade such that the spectrum spreads into adjacent regions of the frequency band and violates system specifications. ...

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PUM

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Abstract

Aspects of this disclosure relate to systems and methods of performing dynamic impedance tuning. Certain aspects may be performed by or include a dynamic impedance matching network. The dynamic impedance matching network can determine a desired output power for a power amplifier, true power information for the power amplifier, and an output power delivered to a load by the power amplifier. In addition, the dynamic impedance matching network can determine whether the output power satisfies the true power information. Responsive to this determination, the dynamic impedance matching network may modify a load line impedance for the power amplifier using an impedance tuning network.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application No. 62 / 097,877, filed December 30, 2014, entitled "COMPRESSIONCONTROLTHROUGHPOWERAMPLIFIERLOADADJUSTEMENT (COMPRESSION CONTROL VIA POWER AMPLIFIER LOAD ADJUSTMENT)," (Compression Control via Amplitude Adjustment of a Radio Frequency Input Signal)" U.S. Provisional Application No. 62 / 097,899, filed December 30, 2014 entitled "COMPRESSIONCONTROLTHROUGHPOWERAMPLIFIERVOLTAGEADJUSTMENT" (compression control via power amplifier voltage adjustment) The priority of Application No. 62 / 097,941, the disclosure of each of which is hereby expressly incorporated by reference in its entirety. technical field [0003] The present application generally relates to wireless communication systems having cascode (or cascode) power amplifiers. Background technique [0004] Many wireless devices include one or more linear power amplifiers. In order for the power amplifier to accurately a...

Claims

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Application Information

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IPC IPC(8): H03F1/56H03F3/20
Inventor D·S·里普利P·J·莱托拉
Owner SKYWORKS SOLUTIONS INC