查询词典 current amplifier

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 article introduces a design method of numerical precision constant current source based on high-power operational amplifier .

介绍了一种在大功率运放 OPA549基础上的数控精密恒流源设计方法。

Various errors of an operational amplifier can be substituted by equivalent error voltage or current sources.

运算放大器的各种误差都可以用等值的电压源或电流源来代替。

A current optimization technique is proposed by making a specification optimization of the Operational Transconductance Amplifier in loop filter.

经由将回路滤波器中的运算跨导放大器的规格做最佳化，一个电流最佳化的技术被提出。

The pharos is controlled by reliable program. Working status data is collected in real time. A two-stage amplifier is used to sense the current signal. VHF transmitter-receiver is used as the means of communication, which is working at 233. 3MHZ. GPS data is collected to calculate the latitude and longitude valued of the pharos. Sleep mode is used to reduce the energy consumption. Auto alarm function and watch dog function are integrated to maintain its stability and reliability.

在用高性能8位处理器68HC908SR12设计的新型遥控遥测航标灯中，充分利用了处理器的功能，实现了对灯器的程序化控制，实时进行数据采集，采用了两级放大器对电流信号进行放大，采用VHF电台进行远程通信，对GPS定位数据进行采集和处理，为了降低功耗实现了定时和睡眠控制，为保证工作稳定性和可靠性，启动了故障处理、自动报警功能，以及看门狗功能。

For quantitative experiments, the intensity of transmitted light can be measured by means of a photocell connected to an amplifier and current-measuring device.

为了定量实验，在测量装置中连接一个具有放大器的光电池，来测量传播明亮的光。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。