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- Abstract： In all optical asynchronous CDMA communication system，multi-user interference and PIN dark current noise can be reduced by introducing double optical harder-limiters. 摘 要： 在全光异步CDMA通信系统中，引入两个光硬件限幅器是有效减小多用户干扰及PIN光电检测过程暗电流噪声的一种方案。
- In all optical asynchronous CDMA communication system，multi-userinterference and PIN dark current noise can be reduced by introducing double optical harder-limiters. 在全光异步CDMA通信系统中，引入两个光硬件限幅器是有效减小多用户干扰及PIN光电检测过程暗电流噪声的一种方案。
- In practice，other noise in the system can be reduced by introducing double optical harder-limiters also，such as：APD shot noise，APD dark current noise，background light and thermal noise. 实际上，引入两个光硬件限幅器同样可以减小系统中的其他噪声：APD光电检测过程中的散粒噪声、暗电流噪声、背景光影响、消光比影响及热噪声。
- dark current noise 暗电流噪声,暗电噪声
- Hence, due to the low noise gain and low dark current, the maximum detectivity (D*) can occur at low negative bias. 因此，由于暗电流与杂讯增益都降低，最大值的侦测度可以在负低偏压时出现。
- The average dark current is often eliminated by means of a zeroing circuit. 平均暗电流常利用调零电路消除。
- However, if a change can be made, the equations show that R should be lowered to decrease voltage noise or raised to decrease current noise. 然而，如果可以改变源电阻的话，公式表明，要降低电压噪声应当减小R，而要降低电流噪声应当加大R。
- Compared to an electrometer, the voltage noise and drift are much lower, and the current noise and drift are much higher. 与测量高源内阻电压的静电计相比，纳伏表的电压噪声和电压漂移更低一些，电流噪声和电流漂移则是静电计要更低一些。
- The thermally generated dark current intrinsic to the photodiodes is always working to charge the diode. 光电二极管固有的热产生的暗电流不断为二极管充电。
- For anharmonic trap, this excitation has energy-selective characters, and depends on the frequency spectrum of the current noise. 对于非简谐阱,这种激发具有能量选择特性,它又取决于电流噪声的频谱分布。
- Why is it that all the fast-moving fish of the dark current have purple backs and usually purple stripes or spots? 怎么搞的，凡是在深暗的水流中游得很快的鱼都有紫色的背脊，一般还有紫色条纹或斑点？
- We find that the photocurrent of this device is not reduced by the additional MQWs but the dark current is. 我们发现超晶格所产生的光电流并没有因为量子井结构而降低，但暗电流却有减少。
- If the photodiodes have large amounts of dark current, much of the diode's signal capacity will be filled up by charge with no signal information. 如果光电二极管有大量的暗电流，大部分二极管信号电容会在没有信号情况下被充满。
- Etching the surface of germanium layer could decrease the dark current and increase the responsivity under the visible light exposure. 当蚀刻锗层的表面时，我们可以得到较低的暗电流并且提升可见光下的光响应。
- This type of amorphous-silicon photodiode has the advantages of low dark current and a capacitance that is independent of the accumulated signal. 这种非晶硅光电二极管有很多优势，如低暗电流和能独立积累信号的电容。
- At the same time we studied the difference for use LED low intensity light source and dark current method, mea sured photoelectron spectrum. 同时也介绍了用LED光源测得的单光电子幅度谱及用热发射法测得的暗电流谱的差异,并分析了两种方法测得的幅度谱的差异的主要根源。
- Finally, we advanced an assumption to explain that thick active region had lower dark current and used the program to simulate the experiment result. 最后我们提出一套理论解释较厚的主动层具有较低的暗电流，并利用程式来模拟实验结果。
- Feedback ammeters with high value sensing resistors in the feedback loop have lower Johnson current noise and thus greater sensitivity than shunt ammeters with lower resistance shunts. 反馈安培计反馈回路中的取样电阻阻值高，其约翰逊电流噪声就比较低，从而比分流电阻值低的安培计的灵敏度更高。
- I groped for the light switch in the dark room. 我在黑暗的房间里摸索着找电灯开关。
