反馈

Students have to study how to efficiently use the tools for performance measurement on basic circuits through observation.(3) The un-ideal performance of circuits such as frequency response and noise.(4) Feedback, Operational amplifier and the stability in feedback system.

通过观察对基本电路性能的量化建立有效的分析工具(3)频率响应和噪声等电路的非理想性的介绍(4)反馈，运放和反馈系统中的稳定性。

Whether an input or output impedance is raised or lowered by feedback depends on the type of amplifier to which feedback is applied, as will be shown in the next section.

通过反馈后输入或输出阻抗是升还是降，取决于所提供的反馈的放大器的类型。在下一节中，我们将讨论这个问题。

Negative feedback circuit is the main body of SAW drive circuit which is composed by operation amplifier and feedback network, its function is to realize output impedance matching and electric circuit stable gain.

负反馈放大器是该驱动电路的主要部分，它由运算放大器加上电阻和电容构成的反馈网络组成，其功能是实现输出阻抗匹配以及保证驱动电路增益的稳定性。

A method to reduce the nonlinear error of a bridge using operational amplifier feedback were introduced,the feedback conditions of canceling nonlinearity were found by circuit analyzing.

采用放大器反馈控制法克服了传感器电桥的非线性误差，通过解析的方法找到了克服非线性误差的放大器反馈控制条件。

Finally, RF and CF are the feedback resistance and capacitance respectively.

最后，RF和CF分别是反馈电阻和反馈电容。

Rise time in a feedback picoammeter is a function of the physical or stray capacitance shunting the feedback resistance.

反馈型皮安计的上升时间是反馈电阻上并联的物理电容或寄生电容的函数。

See the component selection table for recommended values of input and feedback resistance as well as feedback capacitance and compensation capacitance.

查看输入和反馈电阻值的元件选择推荐表以及反馈电容和补偿电容。

This burst waveform has benefits compared to a continuous wave emission in that the laser peak power can be very high for measuring long distances, yet the average power can be kept low for eye safety. And more, the pre-amplified optical receiver possessing temperature compensation and feedback resistance noise compensation is designed which is based on the noise spectrum density theory of silicon avalanche-photodiode.

同时根据硅雪崩光电二极管噪声谱密度理论，设计了具有温度补偿和反馈电阻噪声补偿的激光测距仪前放接收模块，详细分析了背景光，反向高压和反馈电阻对于Si-APD接收性能的影响。

It extends txt2pdf, with features such as the ability to add form feeds, to skip the first form feed, to not print the file name in the first line, to set the top and left margins, and to set all the text to bold, italic, or bold italic.

它扩展了txt2pdf，带有的功能有：增加表单反馈，忽略第一个表单反馈，在头一行不打印文件名，设置顶部和左部边界，设置所有的文本为粗体、斜体，aksk或粗斜体。

Switching Power Supply with the traditional distinction between :(1) not only the output voltage feedback, feedback from the average input current;(2) Current benchmarks signal voltage error signal and full-wave rectifier voltage signal sampling the product.

与传统开关电源的区别是：不仅反馈输出电压，还反馈输入平均电流；(2)电流环基准信号为电压环误差信号与全波整流电压取样信号之乘积。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。