Driving amplifier radio frequency port starting method and system with protection function

Abstract

The invention discloses a driving amplifier radio frequency port starting method and system with a protection function, and relates to the technical field of communication, and the method comprises the following steps: starting a driving amplifier, adjusting the working voltage of the driving amplifier, and setting the working state of the driving amplifier as a cut-off region; maintaining the working state of the driving amplifier in a cut-off region, starting a radio frequency source, and monitoring a radio frequency signal of the radio frequency source in real time; after the radio frequency source is initialized, increasing the working voltage of the driving amplifier, and setting the working state of the driving amplifier as an amplification region, wherein when the working state of the driving amplifier is in the cut-off region, the driving amplifier does not have an amplification function, and when the working state of the driving amplifier is in the amplification region, the driving amplifier has a signal amplification function. The working voltage of the driving amplifier can be controlled, so the radio frequency port of the driving amplifier is effectively protected, the damage risk of a device is reduced, and the service life of the device is prolonged.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for starting a radio frequency port of a driving amplifier with a protection function. Background technique [0002] The high-speed optical communication system includes a client-side module and a line-side module. The principle of the client-side module's sending end is: a high-speed radio frequency signal passes through a gearbox (that is, a rate converter, referred to as a transmission, and its signal amplitude is generally several hundred mV), and then passes through a drive amplifier. Amplify so that the RF signal can be amplified to about 2V, and its voltage is used to drive TOSA (Transmitter Optical Subassembly, optical emission sub-module), [0003] The transmission principle of the line-side module, that is, the line-side coherent optical module is: a high-speed DSP (Digital Signal Processor, digital signal processor) is used as a radio frequen...

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Problems solved by technology

[0004] In daily use, when the RF input is normal, the signal amplitude is normal, and after being amplified by the drive amplifier, the signal amplitude is within the threshold range; when the RF input is abnormal, such as during startup, some stray and irregular signals will leak To the drive amplifier, the transient output of the drive amplifier surges, exceeding the normal amplification range, and the radio frequency is superimposed on the DC VD (drain power supply terminal), resulting in a large jitter in VD, which in turn causes the voltage between VD and VG (gate power supply terminal) If the difference is too large, the RF terminal voltage of the drive amplifier will be too large, approaching or even exceeding the safety threshold. Long-term operation will easily cause EOS (Electrical Over Stress) damage to the drive amplifier and shorten the life span;

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