Power amplifier tube protection circuit

By designing detection and control components in the power amplifier tube protection circuit, orderly power supply to the GaN power amplifier tube was achieved, solving the problem of low power-on control efficiency, improving system reliability, and reducing maintenance costs.

CN122268288APending Publication Date: 2026-06-23SUNWAVE COMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUNWAVE COMM
Filing Date
2026-03-03
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies have low power-on control efficiency for third-generation wide-bandgap semiconductor power gallium nitride (GaN) power amplifier transistors, which are easily damaged due to improper power-on and power-off sequence requirements for gate and drain voltages.

Method used

A power amplifier tube protection circuit is designed, including a first detection component, a second detection component, and a control component. By detecting the status of the negative voltage chip and the power supply, the power supply status of the gate and drain of the power amplifier tube is controlled to ensure orderly power supply.

Benefits of technology

It improves the power-on control efficiency of power amplifier tubes, prevents damage caused by abnormal power supply, enhances system reliability and stability, and reduces equipment failure rate and maintenance costs.

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Abstract

This application discloses a power amplifier tube protection circuit, which includes: a first detection component, a second detection component, and a control component; the first detection component is used to detect first power supply information of a negative voltage chip, wherein the first power supply information is used to indicate the power supply state of the negative voltage chip to the gate of the power amplifier tube; the second detection component is used to detect second power supply information of a first power supply, wherein the second power supply information is used to indicate the power supply state of the first power supply to the negative voltage chip; the control component is used to control the power supply state of the second power supply to the drain of the power amplifier tube according to the first power supply information and the second power supply information. By adopting the above technical solution, the problems of low power-on control efficiency of power amplifier tubes in related technologies are solved.
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