It USES a lock-in amplifier for testing the signal and a personal computer for automatic data scanning, collecting and processing.

利用锁相放大器追踪测量信号，微机自动扫描、采集和处理数据。

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An experiment for power amplifier circuit has been researched in the studying process for the laser scanning apparatus in this article.

在激光扫描的研制过程中，对驱动放大电路的实验进行了探讨。

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