前置放大器

It consists of a bridgeable divide-by-8 prescaler with an integrated preamplifier, a 15-bit programmable divider, a crystal oscillator and a reference divider with two selectable divider ratios (512 / 1024), and a phase/frequency detector together with a charge pump which drives the tuning amplifier.

它包括一个集成前置放大器，一个15位可编程分频器，晶体振荡器和一个带有两个可选分率（512 / 1024），和相位/频率检测器连同参考分频器的弥合的分频8预分频器电荷泵的驱动器调谐放大器。

The elementary circuit of the receiver is made up of PIN photodiode , pre-amplifier, main amplifier , automatic gain control and regeneration circuit .

光接收机的基本结构由光检测器、前置放大器、主放大器、自动增益控制电路和再生电路所组成。

While the most important characteristics of the electrometer voltmeter operational amplifier are low input offset current and high input impedance, the most important requirement for the nanovoltmeter input preamplifier is low input noise voltage.

静电计电压表使用的运算放大器，最重要的特性是低输入偏置电流和高输入阻抗。纳伏表输入前置放大器的最重要的要求，则是低输入噪声电压。

The BCD2000 is packed with 2 state-of-the-art phono preamplifiers, one of which is switchable to a CD player.

BCD2000 还配有 2 个具有先进工艺水平的唱机前置放大器，其中 1 个前置放大器可被切换到 CD 播放机。

The preamplifier which functions as a digital AV control center which does not perform any signal magnification as a preamplifier, but unifies all program sauce other than Phono.

前置放大器的作用是作为一个数字影音控制中心不执行任何信号的前置放大器放大，但所有程序统一调味以外唱机。

The distortion of the spectral density function caused by using class C amplifieation in pre-amplifier are analysed.

此外，本文还就在前置放大器中使用丙类放大器对谱分析结果所造成的失真作了分析。

In this paper, common preamplifiers were introduced. To obtain the biggest output signal of the noise ration, we choose the low noise tube as the pre-amplifier according to best source resistance match principle.

本文以热释电探测器的前置放大电路为例，主要根据最佳源电阻匹配的原则选择低噪声晶体管，作为前置放大器，以得到最大的输出信噪比。

The 405 is a transparent preamplifier, free of colouration, distortion or interference and can be used with confidence as a reference playback system preamp.

405是一个透明的前置放大器，自由的着色，扭曲或干扰，并且可以作为一个参考播放系统前置信心使用。

The 5mV of the audio signal which comes from the microphone to linear amplificated by the audio signals amplifier,then mixes with music signals from other sound sources(eg:the tape 、CD) by the hybird amplifier . By the control of the digital volume controller the mixed signal ,then amplificated again by the preamplifier,when integrated power amplifier for idling time realizes the signal enlargement factor respectively is 10、100、1000 times;moreover is capable of delivering 3V of output to a 600%26Omega; load. the amplificate signal makes the loudhailer work at last.

该音频信号放大器能够将来自话筒5mV的音频信号进行线性放大，然后和来自其他音源的音乐信号通过混合放大器来混合，混合后的信号经数字音量控制器对高低频的增益进行提升与衰减，再通过前置放大器放大，当集成功率放大器为空载的时候实现信号的放大倍数分别为10、100、1000倍；另外再实现当负载为600%26Omega；的时候，输出幅度为3V，最后经扬声器发出悦耳的声音。

However, from reports these mods seem pretty effective in all the preamps in one form or another though i wouldn't do them on anything more than a NAC72 or Nac102 if you want remote, as beyond that you get more value by selling up, buying the cheaper preamp and using the surplus money to mod.

然而，这些器官功能障碍综合征的报告似乎相当的所有前置放大器有效的这种或那种形式，但我不会做任何事情比NAC72或Nac102更多，如果你想远程它们，因为除此之外，你通过出售更多的价值，购买便宜前置放大器和利用剩余的钱国防部。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。