如果一个或多个基础方程是非线性的，例如在应用二极管的场合，那么整个系统也就成了非线性的。
If one or more elemental equations are nonlinear, as is the case for a diode, then the overall system is nonlinear.
前置放大器与均衡器或滤波器跟在雪崩二极管检测器的后面以获得增益，线性信号处理及噪声宽带的抑制。
The avalanche photodiode detector is followed by a front-end amplifier and equalizer or filter to provide gain as well as linear signal processing and noise bandwidth redution.
该二极管在可见光区域响应度高、线性度好、响应速度快。
This diode has a high sensitivity, good linearity and high response speed in the visible light region.
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