Symbol power tracking power supply, symbol power tracking amplification system and symbol voltage regulation method

By introducing multiple switching capacitors and switching units into the symbol power tracking power supply and utilizing the different operating ranges of the MOSFET, the current surge problem in the cyclic prefix time slot of the symbol power tracking power supply is solved, achieving a balance between current limiting and steady-state efficiency, and improving the power supply's performance and reliability.

WO2026060964A1 Publication Date: 2026-03-26HUAWEI TECH CO LTD
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Patent Information

Application Number
PCT/CN2025/093970
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-20
Filing Date
2025-05-09
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing symbol power tracking power supplies experience excessive transient current stress at the beginning of the cyclic prefix time slot, resulting in large overshoot and undershoot on the output bus, which may cause high-frequency resonance, affecting circuit performance and reliability. Furthermore, current current limiting methods are difficult to design and have poor performance.

Method used

By optimizing the internal circuit structure of the symbol power tracking power supply, multiple switching capacitors and switching units are adopted. Each switching unit contains a field-effect transistor (FET). The FET operates in the constant current region or the variable resistance region in different time slots, achieving a balance between current limiting and steady-state efficiency. The use of linear FETs further improves the current limiting accuracy and reliability.

Benefits of technology

Without sacrificing the steady-state efficiency of the circuit, the peak current of the switching capacitor hard charging is limited, overshoot oscillation is suppressed, the working performance and lifespan of the symbol power tracking power supply are improved, and the reliability and stability of the system are enhanced.

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Abstract

Provided in the present application are a symbol power tracking power supply, a symbol power tracking amplification system, and a symbol voltage regulation method. The symbol power tracking power supply comprises a power supply topology, a plurality of switched capacitors, and a plurality of switch units. Each switched capacitor is coupled between the power supply topology and a load, and each switch unit is coupled between one switched capacitor and the load, the voltage levels of the switched capacitors being different; the power supply topology is configured to supply power to the load in one signal period by means of one switched capacitor among the plurality of switched capacitors; each switch unit comprises at least one field effect transistor, and the at least one field effect transistor is configured to connect one switched capacitor to the load. Within a cyclic prefix time slot of one signal period, at least one field effect transistor operates in a constant current region. By means of the field effect transistor operating in the constant current region, the present application can limit the switched current between the switched capacitor and the load, thereby improving operating performance and service life of the symbol power tracking power supply.
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