A real-time monitoring and protection circuit for radio frequency power amplifier

Abstract

The embodiment of the present invention relates to the field of circuit technology, and discloses a real-time monitoring and protection circuit for a radio frequency power amplifier. The circuit includes: a voltage / current detection device for obtaining the working voltage and working current of the power amplifier according to the voltage and current input by an external power supply; Determine whether the working voltage of the power amplifier exceeds the limit, and output a voltage overrun alarm level indication signal at the first output terminal of the voltage / current detection device; determine whether the working current of the power amplifier exceeds the limit, and output the current at the second output terminal of the voltage / current detection device Overrun alarm level indication signal; the AND gate chip outputs a control signal according to the two indication signals to control the power supply of the RF power amplifier on and off through the fast power-off protection device. This method does not need to be processed and judged by the main control device, and directly controls the opening and closing of the power supply of the RF power amplifier. It has the advantages of rapid protection action, strong real-time performance, compact circuit area, and low power consumption.

Description

technical field [0001] Embodiments of the present invention relate to the field of circuit technology, and in particular to a real-time monitoring and protection circuit for a radio frequency power amplifier. Background technique [0002] RF power amplifier is an important part of wireless communication equipment, and it is widely used in civil communication, satellite navigation, remote sensing and telemetry, radar and electronic countermeasures and other fields. Usually the RF power amplifier is located at the end of the transmitter and connected to the antenna via a feeder. After the modulated radio frequency small signal is amplified by the power amplifier, it is radiated into the air through the antenna for wireless transmission. [0003] Due to the high output power, large operating current, and the constraints of linearity index and efficiency, the DC power consumption of the RF power amplifier accounts for a large proportion of the overall power consumption of the s...

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Problems solved by technology

[0005] To this end, the embodiment of the present invention provides a real-time monitoring and protection circuit for radio frequency power amplifiers to solve the problem of transmitting the parameters to be detected to the main control and performing processing and feedback due to extreme conditions in the prior art. There is a large delay, or the main control connection is interrupted, resulting in a failure of the power amplifier

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