查询词典 read amplifier

The control of the lead angle of the motor is studied. The power MOSFETs are used as a power amplifier which adopts a half-bridge circuit.

本文设计了变磁阻电机三相绕组的电流闭环控制系统，并研究了超前角控制问题。

The result indicate that using the theorem analysis ideal arithmetical amplifier is easy,fast and accurate.

结果表明，用该定理分析理想运算放大器简单方便、快速准确。

The overall gain can be reduced if desired by adding an external attenuator after the IF amplifier.

总的增益可以降低，如果通过增加一个外部衰减器，中频放大器后理想。

This is the devastatingly simple technique of subtracting before-and-after amplifier signals and demonstrating that nothing audibly detectable remains.

这是一个极度简单的前后相减功放信号和演示技术以至于什么都听不到了。

In audio, a very low frequency oscillation often resulting from a positive feedback path in an amplifier system .

在音响设备中出现的振荡频率极低的低频振荡，常因放大系统的正反馈回路引起。

The characteristics of high frequency switch power supply are analyzed. The problems in its application on audio frequency power amplifier and the main methods to solve them are pointed out.

分析了高频开关电源的特点及将其应用到音频功率放大器中所遇到的主要问题，以及解决这些问题的基本方法。

The outlook of high frequency switch power supply in application to high fidelity audio frequency power amplifier is indicated.

指出了高频开关电源在高保真音频功率放大器中广阔的应用前景。

A distributed amplifier of the low-pass type can easily be constructed to have a uniform frequency response from audio frequencies to fr...

由实验结果证明，采用m导出式低通滤波器所构成的仿真线的分布式放大器，实较用常K式者，具有更佳的相移特性和频率特性，这与理论上的分析是一致的。

A distributed amplifier of the low-pass type can easily be constructed to have a uniform frequency response from audio frequencies to frequenc...

由实验结果证明，采用m导出式低通滤波器所构成的仿真线的分布式放大器，实较用常K式者，具有更佳的相移特性和频率特性，这与理论上的分析是一致的。

It locks the frequency of the carrier-wave at 35MHz.The stabilization of the carrier-wave can be 4×10-5,the accuracy can be 3×10-5.The frequency modulation and the confection of the carrier-wave are realized by the capacity-changing diode V149 and the integration voltage-control oscillator MC1648 chip.The end power amplifier uses the audion 2SC1970 to make it work in the third magnifying state,it improves the efficiency of the magnifier and the power of the output reaches the design demand.

发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。