查询词典 summing amplifier

By using the hybrid-sensitivity scheme, a H〓 controller is devised and H〓 control in the new MB system is compared with that of PID control. The standard bi-state magnetic bearing amplifier have some disadvantages such as high current harmonics, low reliability and the current mode switching for tri-state amplifier is expounded.

首次将H〓鲁棒控制策略应用于集成化磁轴承系统，详细论述了H〓控制器的设计过程，并与经典PID控制策略进行了比较，表明了H〓控制器优良的抗干扰能力和稳定的鲁棒性。

Nanjing University of Aeronautics and Astronautics,Nanjing,210016Switching power amplifier of magnetic bearing was a nonlinear system.The performance of the switching power amplifier affected the stability of the magnetic bearing control system.A way of establishing the closed-loop system model of magnetic bearing was presented.

磁悬浮轴承开关功率放大器系统为一非线性系统，开关功率放大器的性能影响磁悬浮轴承控制系统的稳定性，为此，提出了一种建立磁悬浮轴承开关功率放大器系统模型的方法。

The magnetizer consists of coil and incentive power, and AE testing system consists of sensor, pre-amplifier, main-amplifier and filter.

本测试系统的硬件部分由磁化器和AE检测系统两部分组成，线圈和激励电源组成磁化器部分，传感器、前放、主放和滤波电路组成的AE检测部分。

Parametric amplifier in a number of microwave devices, widely used, usually in radar, navigation, electronic warfare, radio astronomy microwave systems such as receiver front-end amplifier, greatly increased the sensitivity of the receiver.

参量放大器在许多微波设备中得到广泛的应用，通常在雷达、导航、电子对抗、射电天文等微波系统中作接收机前端放大器，大大提高了接收机的灵敏度。

Especially , with the wide use of the low noise microwave receiver model of "low noise amplifier - mixer - intermediate frequency amplifier", the rejection to image frequency interference has become the last problem how to make the whole receivers noise low and resist interference.

尤其是随着"低噪声放大器——混频器——中频放大器"这种低噪声微波接收机模型的广泛使用，对镜频干扰的抑制已逐渐成为整机低噪声、抗干扰的最后难题。

In the method of the invention, a baseband signal is pre-processed to realize nonlinearity compensation. The pre-processing method comprises the following steps: the filter coefficient and the multinomial coefficient of the high power amplifier are extracted; corresponding gain is calculated for the amplitude value of each point input into the sequence of the baseband signal, and the phase compensation value is calculated according to the amplitude gain; the phase compensation value and the gain which are corresponding to each point are synthesized into re-gain, a pre-processing value pi is obtained, and pre-processing output sequence is formed; the pre-processing output sequence is output into the high power amplifier directly or through a inverse filter.

本发明方法是将基带信号进行预处理来实现抵偿非线性，预处理方法是：提取出高功率放大器的滤波器系数和多项式系数；对输入基带信号序列中的每一点的幅值计算对应的增益，根据幅度增益计算出相位补偿值；每一个点对应的相位补偿值与增益合成复增益，得到预处理值p i ，构成了预处理输出序列；将预处理输出序列直接或经过反向滤波器后输出到高功率放大器中。

It consists of a low noise amplifier, mixer, limiter, FM/FSK demodulator with an external LC tank circuit or ceramic resonator, LPF amplifier, and a data slicer with clock recovery and an integrated data bit synchronizer.

它包括与外部LC谐振电路或陶瓷谐振器，低通滤波器放大器，以及一个集成的时钟恢复和数据位同步数据限幅器的低噪声放大器，混频器，限制器，调频/ FSK解调器。

When the amplifier output is in either the positive or negative saturated state, the positive feedback network provides a voltage at the non-inverting input which is determined by the attenuation of the feedback loop and the saturation voltage of the amplifier.

不论放大器输出是正是负，只要OP达到输出饱和状态，OP正反馈路径就会在OP同相输入端加上一个电压，该电压的大小由OP正反馈路径的衰减和OP输出饱和时的电压共同决定。

This design are composed of pre-amplifier, after-amplifier, and the modules of display and control based on microcontroler.

本设计由前级放大电路、后级放大电路和单片机显示与控制模块构成。

If you only have an old turntable and no amplifier, you will need to amplify the signal using a pre-amplifier before plugging it into the PC sound card.

如果你只有一个老唱盘，没有放大器，你需要使用前置放大器将信号放大，然后再将其与电脑声卡连接。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？