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为了放大激光外差玻璃厚度测量系统中的微弱信号,采用由分立元件构成仪表放大器作为光电探测器前置放大器,解决了放大器与光电接收器之间阻抗匹配,并运用Multsim对电路进行仿真和安装调试。结果证明,放大电路的输出信号符合系统设计的预期要求。
In order to amplify the weak signal in the laser heterodyne glass thickness measurement system, an instrumentation amplifier composed of discrete components is used as the photodetector preamplifier to solve the impedance matching between the amplifier and the optoelectronic receiver. The circuit is simulated and installed by Multsim debugging. The results show that the amplifier output signal in line with the expected system design requirements.