The preamp (or preamp stage of an integrated amp) is next in importance.

前級(jí)放大器或集成放大器的前級(jí)）是其次重要的。

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)通過(guò)對(duì)壓電加速度傳感器的測(cè)量電路的各種實(shí)現(xiàn)方案的深入調(diào)研日韩无码黄色电影网站，提出了一種用集成芯片取代大量分離元件的電荷放大器的實(shí)現(xiàn)方案国产一级性爱网站；(2)制作了完整的電路板；(3)在電荷轉(zhuǎn)換部分的靈敏電容的切換和輸出放大級(jí)的增益切換電路的實(shí)現(xiàn)上提出了程控的方案曰批视频免费观看在线；(4)進(jìn)行了實(shí)驗(yàn)驗(yàn)證免费AA午夜精品，給出了實(shí)驗(yàn)結(jié)果；(5)在實(shí)驗(yàn)結(jié)果的基礎(chǔ)上A级毛片免费久久下载，結(jié)合電荷放大器原理對(duì)系統(tǒng)作了誤差分析晚上福利视频。

A flat high efficiency super-broadband source was presented. We achieved a C+L-band superfluorescent source, in the region from 1524. 0 to 1600.4nm, the power of the ASE are over -12. 0dBm and the ASE profile excursion is only ±1. 4dB in the region from 1539. 2 to 1600.4nm. The power of the ASE is 22. 1mW and the power conversion efficiency is 18. 8%. 9. The amplification characteristics of thulium-doped fiber amplifier had been studied using the basic theory for fiber amplifier. The connection between the Tm-doped fluoride fiber and silicon fiber was accomplished, and we studied the TDFA and the reason that the expecting results hadn't achieved had been analyzed. The assumption of the Er-Tm-co-doped silicon fiber had been presented, and we studied the Er-Tm-co-doped silicon in cooperation with the correlative corporation, some results had been got and the further studies are carried on.

實(shí)驗(yàn)結(jié)果得到了覆蓋C+L-波段的超熒光光源，在1524.0-1600.4nm波長(zhǎng)范圍內(nèi)午夜福利理论片中文字幕，自發(fā)輻射譜的功率均高于-12.0dBm国产A片综合；在1539.2-1600.4nm波長(zhǎng)范圍內(nèi)，自發(fā)輻射譜不平坦度為±1.4dB国产99精品免费线观看视频；熒光總功率為22.1mW搞黄刺激网站，功率轉(zhuǎn)換效率為18.8%； 9黄片国产免费看、應(yīng)用光纖放大器的基本理論激情图片久久久，理論分析和研究了摻銩光纖放大器的放大特性；解決了氟化物摻銩光纖與硅基光纖的連接問(wèn)題成人在线免，進(jìn)行了TDFA的實(shí)驗(yàn)研究欧美激情四射三级网站，分析了沒(méi)有得到預(yù)期結(jié)果的原因在线小视频91；最后提出了鉺-銩共摻硅基光纖的構(gòu)想女人一级片免费，并與有關(guān)單位合作，共同研制了鉺-銩共摻硅基光纖免费啪视频现在线视频网站，得到了一些前期結(jié)果凹凸性爱视频，進(jìn)一步的研究仍在進(jìn)行當(dāng)中。

Subsequently, owing to the self-adaptability of the amplifier gain, the amplifier adjusts the self-gain according to the input RF signal amplitude, leads the output voltage to be stable, and ensures the normal operation of the sub-step circuit.

而后由于放大器增益的自適應(yīng)性欧美午夜理论片在线播放，放大器根據(jù)輸入的RF信號(hào)幅度調(diào)節(jié)自身增益使得輸出電壓穩(wěn)定Av最新高清无码专区，保證了后級(jí)電路的正常工作。

This external unit interfaces through a USB port and features a 1024 channel MCA with internal preamplifier, computer controlled amplifier, high voltage (0-2048V), upper and lower level discriminators and multichannel scaling for half-life and decay studies.

外置單元通過(guò) USB 接口接電腦欧美丰满老熟妇乱子视频在线观看，1024道 MCA 和前置放大器点击进入在线影院毛片，電腦控制放大器，高壓（0-2048V ）国产麻豆亚洲精品专区，上平和下平鑒別器和多道測(cè)量可做半衰和衰變的學(xué)習(xí)研究一级毛片AAAA视频播放。

Therefore, a programmable control amplifier is designed by using digital potentiometers and a low-power operating amplifier.

為此18禁黄黄网站在线看，采用數(shù)字電位器和低功耗運(yùn)算放大器研制了一種程控放大器。

This design uses an AD620 which features low power consumption and high precision as the preamplifier.

在設(shè)計(jì)中采用低功耗美女黄片在线看、高精度的儀用放大器草民网理论片看一天717影院，即AD620作為放大器的前置級(jí)。

Based on the structure of classical instrumental amplifier,a preamplifier for the measurement of EEG signals is improved and designed.

基于經(jīng)典的儀表放大器基本框架先锋av资源网址免费，改進(jìn)和設(shè)計(jì)了一種可用于心電信號(hào)采集的前置放大器两个黄片毛片。

For over 40 years, Dragan has published articles with different original constructions of power amplifiers, low noise preamplifantennas for HF, VHF, UHF and SHF bands.

四十年來(lái)，Dragan 出版了多版本的 HF国产日韩美女精品，VHF久久思思热亚洲免费视频，和 SHF 頻段的功率放大器，低噪音前置放大器的著作欧美日韩国产综合视频。1964 年他獲得業(yè)余無(wú)線電許可證亚洲A级性爱视频。

For over 40 years, Dragan has published articles with different original constructions of power amplifiers, low noise preamplifiers, antennas for HF, VHF, UHF and SHF bands.

四十年來(lái)，Dragan 出版了多版本的 HF欧美午夜在线观看视频高清，VHF免费黄色电影一级，和 SHF 頻段的功率放大器，低噪音前置放大器的著作ww黄色一级视频。1964 年他獲得業(yè)余無(wú)線電許可證超乳爆乳在线观看免费。