Adaptive PA Power Supply Switching Across Frequency Bands
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Solution Overview
Problem
Existing electronic devices face inefficiencies in managing power supply to power amplifiers (PAs) for signal transmission, particularly in handling varying power requirements and peak-to-average power ratios across different frequency bands, leading to unnecessary power consumption and limited flexibility in power management.
Innovation Solution
The implementation of a power supply module with multiple power supply circuits and a switch module that allows dynamic switching between these circuits to provide adaptive voltage based on average or instantaneous power requirements, using techniques like Average Power Tracking (APT) and Envelope Tracking (ET), enabling efficient power management across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power supply circuit is used for power amplifiers, then device complexity is reduced, but power management flexibility and adaptability to different frequency bands deteriorate
Solution Approach 1:
The power supply circuit is segmented into multiple independent power supply circuits (first power supply circuit and second power supply circuit), each capable of independently powering different power amplifiers. This segmentation allows selective activation of power supply circuits based on operational requirements, providing flexibility in power management while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The power supply circuits are designed with multi-functionality, where each power supply circuit can serve multiple power amplifiers across different frequency bands. The first power supply circuit can power PAs in both first and second frequency bands, and the second power supply circuit can also power PAs in both bands, enabling adaptive power management and enhancing system versatility without proportionally increasing complexity.
2Reliability
If power supply circuits are always connected to all power amplifiers, then power availability is ensured, but unnecessary power consumption increases
Solution Approach 1:
The power supply system implements dynamic connection and disconnection of power supply circuits to power amplifiers based on real-time operational requirements. The controller selectively connects power supply circuits to specific PAs in specific frequency bands only when needed, rather than maintaining permanent connections. This dynamic approach ensures power availability when required while eliminating unnecessary power consumption during idle periods or when alternative power supplies are sufficient.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller monitors the operational state of power amplifiers and frequency band usage, then adjusts power supply connections accordingly. When a PA is actively transmitting in a specific band, the corresponding power supply circuit is connected; when inactive or when diversity mode is active, connections are dynamically adjusted or disconnected to minimize power consumption while maintaining reliability.
3Device complexity
If fixed voltage supply is used for power amplifiers, then circuit design simplicity is maintained, but adaptability to varying power requirements across frequency bands deteriorates
Solution Approach 1:
The power supply circuits are designed to dynamically change voltage parameters based on the specific operational requirements of different frequency bands and power amplifiers. Each power supply circuit can adjust its output voltage to match the optimal requirements of the connected PA, whether operating in the first frequency band or second frequency band. This parameter adaptability enables efficient power amplification across different bands without requiring overly complex circuit designs, as the voltage adjustment is managed through controlled switching and regulation.
Data Source
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AI summary
An electronic device is provided. The electronic device may comprise a first antenna. The electronic device may comprise a second antenna. The electronic device may comprise a power supply circuit including a first power supply circuit and a second power supply circuit. The electronic device may comprise a first front end module (FEM) including a power amplifier (PA) connected to the first power supply circuit and connectable to the second power supply circuit. The electronic device may comprise a second FEM including a PA connected to the second power supply circuit and connectable to the first power supply circuit. The electronic device may comprise at least one processor including a processing circuit.