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Auditory Brainstem Response, ABR (or Brainstem Auditory Evoked Potentials, BAEP) is a human body physiology parameter at microvolt level. First, we use the TMS320F2812 of TI company, making the signal through D/A transform and high accuracy operational amplifier, and produce the masking white noises, as well as the Tone Burst to be the stimulus. Then, the evoked EEG will be amplified and filtered. At the same time, we use the A/D of TMS320F2812 to collect and process the signals, and get the digital BAEP.

听觉脑干诱发电位(Auditory Brainstem Response，ABR)为微伏级人体生理参量，采用TI公司的DSP TMS320F2812，通过D/A与高精度运算放大器，生成听力级可调整的掩蔽白噪声与短纯音TB进行刺激，同时对诱发脑电进行放大、滤波、并使用TMS320F2812的A/D进行信号采集与处理，得到数字化的脑干诱发电信号。

This paper is to study the low noise amplifier, the primary stage of the RF/microwave receiver, The function of LNA is to amplify the uV vohage signal received by antenna.

低噪声放大器是对来自天线的微伏级信号进行放大的射频接收端的放大模块。

Only flat machine control system from personal computer and industrial production object two most of groups become, it is rear that clear overheat quick resistance sensing element of this paper measure for some courses of giving assigned scope for systematic temperature on project through amplifier millivolt to enlarge ,analyse with only flat machine, handling uses program through PID algorithm to control entire process, needs ADC0809 in system,8155th class chip.

单片机控制系统由微机和工业生产对象两大部分组成。本文通过热敏电阻这个敏感元件，对工程上一些对系统温度给与规定范围的过程，通过放大器毫伏量放大后，用单片机进行分析，处理通过 PID 算法用程序控制整个流程，系统中需要 ADC0809，8155等芯片。

Direct effect on the pressure distribution in the diaphragm, sensitive resistors sensitive patch on the bridge, using the huygens stearns piezoresistive effect achieved pressure strength to signal conversion, through the subsequent circuit will sensitive components of millivolt signal disposal for industrial standard signal amplifier.

传感器膜片及壳体材料具有不同的介质兼容性，用户应考虑被测介质的种类、杂质含量、浓度、温度等条件对压力测量产生的影响，选择合适的防护材料和测量结构。外壳接地端必须接地良好，接地电阻符合相关电气规范

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。

First, you should place the Class D amplifier close to the speaker. In the case of stereo applications, you should use two monophonic amplifiers rather than a single stereo chip, so that you can place the two amplifiers next to the two speakers, usually at the sides of the handset.

首先，您应将D级音频放大器放在接近扬声器的位置，在采用立体声效果的时候，您应使用两个单声道音频放大器而非一个单独的立体声放大器，以便您可将两台音频放大器分别放在挨近两个扬声器的位置，通常是放在手机两侧。

The phonograph that has a golden morning-glory flower shaped amplifier has become an emblem of old Shanghai.

十里洋场，繁华旧梦，那种长着金色牵牛花喇叭的老式留声机，成为了旧上海一个时代的象征。

There are two loops in the control circuit which the feedback of the output voltage is the outer loop. In this loop there is a voltage error amplifier, a squarer, a divider and a multiplicator.

控制电路采用双闭环，外环输出电压反馈构成电压环，由电压误差放大器和一个平方器，一个除法器，及一个乘法器构成。

On the basis of the structure of a pole conductivity detector for an integrated low voltage electrophoresis chip,a contactless conductivity detecting circuit is designed according to the working principle of high frequency contactless conductivity detecting,which consists of an AC inspiriting signal generator,a I-V convertor,a multiplicator,a low-pass filter and a differential amplifier.

根据低电压集成电泳芯片柱端非接触高频电导器的结构和非接触高频电导检测的基本原理，设计了非接触电导检测电路。该电路包括AC激励信号发生器、I-V转换器、乘法运算器、低通滤波器和差分放大器。

These results are used to discuss the optimizing design of a CW laser seeded multistage dye laser amplifier.

最后利用这些结果，对连续激光的多级染料放大系统的优化设计进行了讨论。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。