查询词典 audio amplifier

The Difference Amplifier 差分放大器: The difference amplifier is the complement of the summing amplifier and allows the subtraction of two voltages or, as a special case, the cancellation of a signal common to the two inputs.

电路见图5，这种电路在运算电路中相当有用，比如差分对单端的转换，抑制共模信号。

The relation between quiescent point and voltage gain,input resistance,output resistance, maximum nondistortion output voltage ,dynamics parameter in amplifier is discussed by commom-emitter fixed-bias amplifier,the effective methods to improve voltage gain are deduced,and how to set reasonale quiescent point′s position based on amplifier′ different is also presented finally.

以共射固定偏置放大电路为例讨论放大电路中静态工作点与电压放大倍数、输入电阻、输出电阻、最大不失真输出电压等动态参数的关系，得出提高电压放大倍数的有效方法。

The switching power amplifier is optimized based on the achievement of electromagnetic force, and the circuit structure of tristate power amplifier with soft-switching is designed. This circuit owns the advantages of reducing the dissipationpower on the power component and improving the speed of system dynamic response, enhancing the stability of the electromagnetic force in the final state, and the nice result is presented by the simulation. The small-signal model of the power amplifier is also established.

在实现支撑所需的电磁力基础上，对开关功率放大器电路进行了优化设计，采用三电平软开关的电路结构，以降低主功率器件的功耗、提高系统的动态响应速度、提高稳态电磁力的平稳性；仿真分析表明可以达到预期的效果；最后还建立了功率放大器的小信号模型，为控制系统的调节器设计提供了依据。

Based on these theories, this paper discusses the method of the design of the low noise amplifier integrated active microstrip patch antenna, which considers the low noise amplifier and the microstrip antenna and takes both mutual matching into account. The size of the active integrated antenna and the circuit configuration of the low noise amplifier are obtained at the specified operation frequency.

根据这些理论，把低噪声放大器和微带天线结合起来，并考虑两者之间的匹配，讨论了一种集成低噪声放大器的有源微带贴片天线的设计，得到了在给定工作频率下的有源集成天线尺寸和低噪声放大器的电路结构。

Those provide a practical and valid method for designing a feedforwardpower amplifier. Utilizing these and for TD-SCDMA we research and develop thedivider, coupler, bridge and power amplifier at 2.35GHz. Finally I accomplished asimple and minimal structured feedforward power amplifier. Its measured third-orderintermodulation distortion is -50dBc, which is 40dB greater than there is nolinearization technique.

根据分析结论，针对中国自主开发的TD-SCDMA 标准，设计实现了2.35GHz 的功分器、功率合成器、耦合器以及矢量调制器和功率放大器，最终实现了结构简单、体积小巧的前馈功放系统，完成了对放大器的线性化，三阶交调系数优于-50dBc 比线性化之前三阶交调系数改善了40dB。

At final calibration the amplifier is precision set for low distortion (typical 0.0025% THD) and then given a listening test to verify amplifier performance. Because all parts which wear out have been replaced and the amplifier is brought to the latest standards, EKSC Eagle provides a two year transferable warranty on every "Double Cap" unit.

在最后的校准精度的放大器是为低失真（典型值0.0025％THD）的设置，然后给他们一听测试，以验证放大器的性能，因为所有的磨损已被替换的放大器带来的最新标准的一部分。，EKSC鹰提供两年转让的保修每一个&双章&单位。

In new-model laser driver, the main amplifier which commonly has many disk amplifier mediums is multi-pass amplifier system.

新一代ICF激光驱动器的主放大器均采用多程放大结构，放大器一般由八片左右的片状放大介质级联而成。

Main works of the author:(1) Has developed a design of charge amplifier which using a kind of integrated chip replace a large number of leave components, though all the realized proposal of measurement circuit for the piezoelectric accelerometer;(2) Has made the circuit board;(3) Has proposed a programme-controlled scheme in the sensitivity throw-over of charge convert and gain throw-over of output amplifier;(4) Has done the experiment, give the experimental result;(5) Has done the error analysis based on the experimental result and the principle of the charge amplifier.

作者完成的主要工作包括：(1)通过对压电加速度传感器的测量电路的各种实现方案的深入调研，提出了一种用集成芯片取代大量分离元件的电荷放大器的实现方案；(2)制作了完整的电路板；(3)在电荷转换部分的灵敏电容的切换和输出放大级的增益切换电路的实现上提出了程控的方案；(4)进行了实验验证，给出了实验结果；(5)在实验结果的基础上，结合电荷放大器原理对系统作了误差分析。

The SSM2603 is a low power, high quality stereo audio codec for portable digital audio applications with one set of stereo programmable gain amplifier line inputs and one monaural microphone input.

ADI公司的SSM2603是低功耗高质量立体声数字音频CODEC，具有一组立体声可编程增益放大器线输入和麦克风输入。

Line Out jack of the audio output signal without amplification for the access of active speakers or amplifiers; SPK socket built-in sound card output by the audio signal amplifier for the next speaker or passive speaker .

Line Out 插座输出未经放大的音频信号，用于接有源音箱或放大器； SPK 插座输出经声卡内置放大器放大的音频信号，用于接无源音箱或喇叭。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。