Envelope Tracking Power Supply With Multi-Current Superposition
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Solution Overview
Problem
Existing power supplies for envelope tracking in mobile communication devices do not efficiently manage supply voltage across varying output powers, limiting energy utilization and compatibility with advanced mobile communication technologies.
Innovation Solution
A power supply system that includes high-frequency and low-frequency filtering units, controlling units, driving units, and a delaying unit to generate and superimpose currents based on preset and variably-set thresholds, providing a dynamic supply voltage to the radio-frequency power amplifier, enhancing efficiency and compatibility with future mobile communication technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional power supply is used for envelope tracking, then the supply voltage can be adjusted dynamically, but the energy utilization efficiency is insufficient
Solution Approach 1:
The power supply is segmented into multiple independent current sources (first current source, second current source, third current source) each handling different frequency components of the envelope signal. This segmentation allows each current source to be optimized for its specific frequency range, improving overall energy efficiency while reducing energy loss in any single component.
Solution Approach 2:
The power supply employs dynamic voltage adjustment through multiple current sources that respond to different frequency components of the envelope signal in real-time. The filtering units and controlling units dynamically adjust the contribution of each current source based on the instantaneous frequency content, enabling the system to maintain optimal efficiency across varying operating conditions.
2Adaptability or versatility
If the power supply adjusts supply voltage dynamically, then energy utilization improves, but compatibility with advanced mobile communication technologies is limited
Solution Approach 1:
The power supply structure is segmented into modular components (filtering units, controlling units, current sources) that can independently handle different frequency components. This modular segmentation enhances adaptability to various mobile communication technologies while keeping each individual module relatively simple, thus managing overall device complexity.
Solution Approach 2:
The power supply design incorporates multiple current sources and filtering units that can universally handle different frequency components of envelope signals from various mobile communication technologies (4G, 5G, and beyond). This multi-functional capability ensures broad compatibility without requiring technology-specific redesigns, balancing versatility with manageable complexity.
Data Source
AI summary
Provided is a power supply for envelope tracking, comprising: a first driving unit for finally providing a first current based on a preset and variably-set first high-frequency threshold or threshold interval; a second driving unit for finally providing a second current based on a preset and variably-set second low-frequency threshold or threshold interval; a third driving unit for providing a third current based on a delayed signal; and a superimposing unit for superimposing the first current, the second current, and the third current to provide a supply voltage of a radio-frequency power amplifier. A new power supply for envelope tracking is provided, which is capable of more efficiently providing a supply voltage of the radio frequency power amplifier by superimposing a first current to a third current.