查询词典 voltage comparator

This paper introduces the research and implementation of all-purpose high-speed test adapter for ADC. The main contents includes two methods about how to testing the static parameters and dynamic parameters for ADC. The servo loop method is proposed to static parameters, by using the test principle of high-precision voltage source, high-precision voltage meter and digital comparator. To dynamic parameters, the DDS chip of AD9851 is used to generate sine waves with high signal to noise ratio, then the high-s...

servo loop ； FFT ；本文介绍了关于ADC高速通用测试适配器的研究和实现，主要介绍了测试ADC芯片静态参数和动态参数两种方法，针对静态参数，提出了用伺服环的方法，采用高精度电压源，高精度电压表和数字比较器的测试原理；针对动态参数，提出了用DDS芯片AD9851产生高信噪比的正弦波，采用高速采样模块采集数据，最后用FFT算法对采集的数据进行处理。

When the cables use in alternating current system, rated voltage of cables should be at least equal the rated voltage of the system; When the cables use in direct current system,rated voltage should be not greater than 1.5 times of the rated voltage of the cables .

当电缆使用于交流系统时，电缆的额定电压至少应等于该系统的额定电压；当电缆使用地直流系统时，该系统的额定电压应不大于电缆额定电压的1.5倍。

The invention relates to an ESD protector which comprises the first well and the second well inside the semi-conductor liner, while a separating area is between them; the N pour area is inside the second well, to couple the first node; the NLDD area is between the N pour areas, and annularly poured under the NLDD areas; when the voltage of first node is higher than the breakdown voltage, the current discharge path is limited by the NLDD area and annular pour; said breakdown voltage is lower than the breakdown voltage of oxide of logic gate.

本发明提供了ESD保护技术。一种ESD保护器件包括设置在半导体衬底中的第一阱区和第二阱区，并且隔离区位于中间。N 注入区被设置在第二阱区中，并且在第一节点处耦合在一起。NLDD区被设置在N 注入区之间，并且环形注入位于每个NLDD区之下。当第一节点的电压超过击穿电压时，电流放电路径由对应的NLDD区和环形注入所限定。在一个具体实施例中，所述击穿电压小于逻辑门氧化物的击穿电压。

Capacitor voltage transformer decreases the voltage with capacitance bleeder, and complete the work that convert high voltage to low voltage with electromagnetic unit.

随着电压等级的提高，电容分压器节数增多，受运行条件的影响也加大，选型对保证1000kVCVT的正常工作至关重要。

Solar controller series is the intelligent control of micro-computer chip products, it can real-time monitoring of solar cell voltage and battery voltage, when the charging voltage reaches the rated voltage automatically transferred to the pulse charging, the battery automatically stops charging after saturation, the effective prevention of Charge-off and less filling.

串联型太阳能控制器，是微电脑芯片控制的智能产品，它能实时监控太阳能电池的电压和蓄电池的电压，当充电电压达到额定电压时，自动转入脉动充电，蓄电池饱和后自动停止充电，有效防止过充和欠充。

The invention relates to an amplifier circuit containing a high-frequency transistor (1) and having a circuit (2) for adjusting the operating point, which provides a base current for the high-frequency transistor (1) according to the voltage released at a resistor (3) which is connected in the collector ring of the high-frequency transistor (1). The circuit (2) has a differentiating unit (20), fed by the supply voltage, which compares the voltage released at the resistor (3) with a reference voltage.

带有高频晶体管(1)的放大器电路具有一个用于工作点调整的电路(2)，其依赖于在连接在高频晶体管(1)的集电极电路中的电阻(3)上下降的电压为高频晶体管(1)提供基极电流，电路(2)具有一个由供电电压馈电的差分节(20)，其把在电阻(3)上下降的电压与基准电压比较。

The light source detecter makes used of the variation of the separated voltage by the resistivity of photosensitive resistance input to the singlechip. If the voltage higher than a worth, the singlechip will regard it as high voltage state, it means that the light source has been detected. Otherwise the low voltage state means the light source has not been detected.

光源探测是利用光敏电阻阻值分压的变化向单片机输入，电压大于某值时，单片机认为是高电平，即表示该路探测器感应到光源，否则为低电平，即表示探测器没有感应到光源，如此即可由两路信号判断光源的方向。

Protection schemes based on the zero sequence fundamental voltage and the third harmonic voltage and the injection voltage are presented in this paper, and based on which, the factors which affects the protection schemes based on the zero sequence fundamental voltage and the relevant measures is presented.

本文在对基波零序电压型定子接地保护、三次谐波电压型定子接地保护和外加电源式定子接地保护各种方案的构成原理及其优缺点进行分析的基础上，详细分析了影响基波零序电压型定子接地保护的各种因素，并提出了相应措施。

Maintain deflector if the size of the same voltage, the voltage change is accelerating, we can see a very accelerated voltage reduce, electron beam deflection angle instead of increasing, it is because of low accelerating voltage, the electron velocity smaller horizontal direction, electronic deflection plates in the field of the role of the extended time, the angle of deflection increases .

如果保持偏转板的电压大小不变，改变加速极的电压，可以看到加速极的电压减小，则电子束偏转的角度反而增大，这是因为加速极电压低，则电子的水平方向速度变小，电子在偏转板中受电场力作用的时间加长，所以偏转的角度增大。

As a DC/DC basic structure is adopted, the operational amplifier leads the non inverting input end voltage of the error amplifier to follow the input voltage linearly, thus realizing the linear following relation between the output voltage and the input voltage.

由于采用DC/DC的基础结构，增加运算放大器使误差放大器的同相输入端电压与输入电压线性跟随，从而实现输出电压与输入电压的线性跟随关系。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。