Power Amplifier Supply Control Using Local PA Feedback

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Solution Overview

Problem

Existing power amplification systems in wireless communication devices have limited ability to adjust the switching mode power supply (SMPS) based on the operating conditions of the power amplifier (PA), leading to suboptimal performance and efficiency.

Innovation Solution

A power amplification control system that includes an interface to receive transceiver control signals, generating both power amplifier and power supply control signals, with the power supply control component able to adjust based on local signals from the power amplifier control component, allowing for integrated control of the power amplifier and power supply without direct transceiver coupling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the SMPS and PA are controlled independently by a modem/transceiver system, then the control architecture is simple and modular, but the ability to adjust the SMPS based on PA operating conditions is limited

Engineering Contradiction:
Improveability to adjust SMPS based on PA operating conditionsVSAvoidcontrol architecture complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the SMPS control functionality with the PA control by integrating a power supply control component into the PA control component. This integration allows the unified control component to receive transceiver control signals and generate both PA control signals and power supply control signals, enabling the SMPS to be adjusted based on PA operating conditions while maintaining a relatively simple control architecture.

Inventive Principle:
Principle #5Merging (Combining)

2Productivity

If the power supply control component adjusts based on local signals from the power amplifier control component, then the efficiency and performance are improved, but the control system complexity increases

Engineering Contradiction:
Improvepower supply adjustment efficiencyVSAvoidcontrol system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces a local control signal path where the PA control component acts as an intermediary between the transceiver and the power supply control component. The PA control component receives transceiver control signals, processes them locally based on PA operating conditions, and generates power supply control signals accordingly. This intermediary approach enables efficient power supply adjustment while distributing control logic across multiple components.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Measurement precision

If direct transceiver coupling is used for power supply control, then the control precision is high, but the device complexity and software requirements increase

Engineering Contradiction:
Improvepower supply control precisionVSAvoidsoftware and setup requirements
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses the PA control component as an intermediary that translates transceiver control signals into precise power supply control signals. This intermediary approach maintains control precision by ensuring that power supply adjustments are directly tied to PA operating conditions, while reducing software complexity by implementing the control logic in hardware components rather than requiring custom transceiver software.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11876492B2Systems and methods related to power amplification and power supply control
Publication Date: 2024.01.16 SKYWORKS SOLUTIONS INC
  • US11876492B2 patent drawing
  • US11876492B2 patent drawing
  • US11876492B2 patent drawing

AI summary

Systems and methods related to power amplification and power supply control. A power amplification control system can include an interface configured to receive a transceiver control signal from a transceiver. The power amplification control system can include a power amplifier control component configured to generate a power amplifier control signal based on the transceiver control signal from the transceiver and a power supply control component configured to generate a power supply control signal based on the transceiver control signal from the transceiver and to generate the power supply control signal based on a local control signal from the power amplifier control component.