Radio-frequency power amplifier real-time monitoring and protecting circuit

Abstract

The embodiment of the invention relates to the circuit technical field, and discloses a radio-frequency power amplifier real-time monitoring and protecting circuit. The circuit comprises: a voltage / current detection device and a AND gate chip. The voltage / current detection device is used for: acquiring the working voltage and the working current of the power amplifier according to the voltage andthe current inputted by an external power supply; determining whether the working voltage of the power amplifier is over-limit or not, and outputting a voltage over-limit alarm level indication signalby the first output end of the voltage / current detection device; determining whether the working current of the power amplifier is over-limit or not, and outputting a current over-limit alarm level indication signal by the second output end of the voltage / current detection device. The AND gate chip outputs a control signal according to the two indication signals to control the power supply of theradio frequency power amplifier to be turned on and off by a rapid power-off protection device. According to the radio-frequency power amplifier real-time monitoring and protecting circuit, the powersupply of the radio-frequency power amplifier is directly controlled to be turned on and off without processing and judging by a master control device; the method has the advantages that the protection is rapid, the real-time performance is high, the circuit area is compact, the power consumption is low, and the like.

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...

AI Technical Summary

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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