查询词典 current amplifier

R2 and R4 are chosen to minimize errors due to input offset current as outlined in the section describing the photocell amplifier.

R2和R4用来降低因输入失调电流产生的误差，其原理与前文光电二极管放大器所述一致。R3用于抑制灯泡L1初次通电时的浪涌电流。

Because the input and output resistance of the CMOS complementary amplifier decreases owing to the negative feedback resistor,the voltage swings are reduced,and the response time of the current comparator is short and the speed is fast.

由于CMOS互补放大器的负反馈电阻降低了它的输入、输出阻抗，从而使电压的变化幅度减小，所以该电流比较器具有较短的瞬态响应时间和较快的速度。

The monitoring unit may the real-time surveillance amplifier's electric current, the voltage and the power and demonstrated by the kneading board electric instrument.

监控单元可实时监视放大器的电流、电压和功率并由面板电表显示。

Base on these, we find out some different characteristics of Relativistic Klystron Amplifier, the current modulation will be enhanced by its own pace potential voltage.

通过理论分析揭示了相对论速调管的一个新的特性，即它会在自身产生的空间电荷场作用下，能够进一步增强自身的电流调制。

To overcome these drawbacks, the application of current mode tri-state modulation technology to the switching power amplifier for magnetic bearings is proposed, as well as its special advantages.

文中首先分析了电流纹波对磁轴承系统的影响，接着分析了电流两态调制技术本身的固有不足及电流三态调制技术在磁轴承开关功放应用中的优势。

Power electronics ; Switching power amplifier ; Magnetic bearing ; Current mode tri-state modulation

电力电子；开关功率放大器；磁轴承；电流三态调制

When a digital control panel to start regulating magnetic amplifier control winding excitation current, to change the saturable reactor to start the electrical resistance value of adjustable voltage drop, to achieve soft-start motor.

启动时通过数字控制板调节磁放大器控制绕组的激磁电流，改变饱和电抗器的电抗值调节启动电压降，实现电动机软启动。

The device includes on-chip Hall voltage generator for magnetic sensing, the error amplifier that amplifies the Hall voltage, a comparator that is to provide switching hysteresis for noise rejection, the bi-direction drivers for sinking and driving large current load, and the frequency generator thatprovides a signal proportional to rotation speed.

该器件包括片上大厅为磁场传感，误差放大器，放大的霍尔电压，比较器是提供切换噪音抑制滞后电压发生器，双向驱动的吸收和大电流负载，频率方向司机发电机提供了一个信号，转速成正比。

Reactive compensation device, a new kind of dynamic device which can separately measure the voltage and current signals using PCC as master controller and can sample the signals using programmable amplifier, may pretreat the reference voltage in order to adjust expediently.

0引言在电网中安装并联电容器等无功补偿装置，可就地补偿感性负载所消耗的无功功率，从而减少电网电源向感性负荷所输送的无功功率，降低线路和变压器因输送无功功率造成的电能损耗。

Regarding humidity sensor as the core, the humidity measurement circuit of the humidity transducer is made up of nor gate circuit or 555 circuit and the output-circuit of it is made of operational amplifier, OP295 and BD237 in order to realize 4~20 mA current output.

湿度变送器以湿敏元件为核心，利用或非门电路或者555电路构成检测电路，利用运算放大器OP295和BD237构成输出电路，实现4~20 mA电流输出。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。