Adaptive PA Power Supply Switching for Wider Transmit Range
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Solution Overview
Problem
Existing electronic devices face challenges in efficiently managing power supply circuits for power amplifiers (PAs) in front end modules (FEMs) to optimize transmit power across various frequencies, leading to inefficient power consumption and limited dynamic range.
Innovation Solution
The electronic device incorporates a power supply module with multiple power supply circuits, including an average power tracking (APT) and envelope tracking (ET) modulator, and a switch module to dynamically connect and disconnect PAs from different power supply circuits based on processor control, allowing for adaptive voltage adjustment and dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single power supply circuit is used for the power amplifier, then the device complexity is reduced, but the adaptability to different transmit power requirements is limited
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 providing different voltage levels. This segmentation allows the PA to be selectively connected to different power supply circuits based on transmit power requirements, thereby improving adaptability without requiring a completely new system design.
Solution Approach 2:
The system employs dynamic switching between different power supply circuits based on real-time transmit power requirements. The processor dynamically controls the connection state of the PA to different power supply circuits, enabling the system to adapt to varying power demands while maintaining manageable complexity through automated control.
2Adaptability or versatility
If multiple power supply circuits are used for the power amplifier, then the adaptability and dynamic range are improved, but the device complexity increases
Solution Approach 1:
Multiple power supply circuits are designed with universal functionality, where each circuit can serve different PAs depending on the transmit power requirements. The first power supply circuit can supply power to both the first PA and second PA, and similarly for the second power supply circuit. This multi-functionality improves dynamic range while avoiding redundant circuit designs that would increase complexity.
Solution Approach 2:
A processor acts as an intermediary to manage the complexity of multiple power supply circuits. The processor automatically determines the appropriate power supply circuit to connect based on transmit power requirements, thereby shielding the user from the complexity while enabling the system to utilize the full dynamic range provided by multiple power supply circuits.
3Power
If the power amplifier is constantly connected to high voltage power supply, then the transmit power capability is maintained, but the power consumption increases
Solution Approach 1:
The system employs periodic assessment of transmit power requirements to determine the appropriate power supply circuit connection. Rather than maintaining constant high voltage connection, the system periodically evaluates whether high power mode is needed and switches accordingly, thereby maintaining transmit power capability when needed while reducing power consumption during low-power operation.
Solution Approach 2:
The system changes the voltage parameter of the power supply circuit based on transmit power requirements. When high transmit power is needed, the PA is connected to high voltage power supply circuits; when low transmit power suffices, the system switches to low voltage power supply circuits or disconnects unnecessary connections, thereby maintaining power capability while optimizing power consumption through parameter adjustment.
Data Source
AI summary
An electronic device is provided. The electronic device includes a first antenna. The electronic device includes a second antenna. The electronic device includes power supply circuitry including a first power supply circuit and a second power supply circuit. The electronic device includes 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 includes a second FEM including a PA connected to the second power supply circuit and connectable to the first power supply circuit. The electronic device includes at least one processor comprising processing circuitry.