而文中给出的公式可用于计算外接元件。
本系统实用性强，能够很好地实现多路信号采集测量，结构较为简单，成本低，外接元件少。
Practicability of the system can achieve a good measurement of multi-channel signal acquisition, the structure of relatively simple, low cost, less external components.
由于限幅放大器具有设计简单、功耗低、芯片面积小和外接元件少的优点，本文选择限幅放大器的形式来实现光接收机的主放大器。
The latter one was chosen to realize the main amplifier in our design since it has the features of simple topology, few external components and fast responsibility.
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