Opertional Amplifier的用法和样例：
例句
- In this paper,the principle of making an optical power meter using the amplifier and silicon photocell is introduced.
介绍使用运算放大器以及硅光电池制作光功率计的原理以及制作的过程。 - Electrometer and nanovoltmeter characteristics differ, so the operational amplifier requirements for these two types of instruments are also somewhat different.
静电计和纳伏表的特性不同，所以这两种仪器对运算放大器的要求也有所不同。
