氛及其子體的能譜測量中常用到鈍化離子注人硅探測器或金硅面壘探測器。本文介紹了一種用于這兩類硅半導(dǎo)體探測器的電荷靈敏放大器的實(shí)例,它由電荷靈敏級(jí)和電壓放大級(jí)構(gòu)成。給出了它的設(shè)計(jì)思想和調(diào)試過程。介紹了測試手段并測試了它的技術(shù)指標(biāo),說明了應(yīng)用場合。
標(biāo)簽: 硅半導(dǎo)體 探測器 電荷靈敏 放大器
上傳時(shí)間: 2014-12-23
上傳用戶:hphh
基于0.25gm PHEMT工藝,給出了兩個(gè)高增益K 波段低噪聲放大器.放大器設(shè)計(jì)中采用了三級(jí)級(jí)聯(lián)增加?xùn)艑挼碾娐方Y(jié)構(gòu),通過前級(jí)源極反饋電感的恰當(dāng)選取獲得較高的增益和較低的噪聲;采用直流偏置上加阻容網(wǎng)絡(luò),用來消除低頻增益和振蕩;三級(jí)電路通過電阻共用一組正負(fù)電源,使用方便,且電路性能較好,輸入輸出駐波比小于2.0;功率增益達(dá)24dB;噪聲系數(shù)小于3.5dB.兩個(gè)放大器都有較高的動(dòng)態(tài)范圍和較小的面積,放大器ldB壓縮點(diǎn)輸出功率大于15dBm;芯片尺寸為1mm×2mm×0.1mm.該放大器可以應(yīng)用在24GHz汽車?yán)走_(dá)前端和26.5GHz本地多點(diǎn)通信系統(tǒng)中.
上傳時(shí)間: 2014-12-23
上傳用戶:masochism
The LT®6552 is a specialized dual-differencing 75MHzoperational amplifier ideal for rejecting common modenoise as a video line receiver. The input pairs are designedto operate with equal but opposite large-signal differencesand provide exceptional high frequency commonmode rejection (CMRR of 65dB at 10MHz), therebyforming an extremely versatile gain block structure thatminimizes component count in most situations. The dualinput pairs are free to take on independent common modelevels, while the two voltage differentials are summedinternally to form a net input signal.
上傳時(shí)間: 2014-12-23
上傳用戶:13691535575
運(yùn)算放大器是線性設(shè)計(jì)的基本構(gòu)建模塊之一。在經(jīng)典模式下,運(yùn)算放大器由兩個(gè)輸入引腳和一個(gè)輸出引腳構(gòu)成,其中一個(gè)輸入引腳使信號(hào)反相,另一個(gè)輸入引腳則保持信號(hào)的相位。運(yùn)算放大器的標(biāo)準(zhǔn)符號(hào)如圖1所示。其中略去了電源引腳,該引腳顯然是器件工作的必需引腳。
標(biāo)簽: VFB 電壓反饋 運(yùn)算放大器
上傳時(shí)間: 2013-11-14
上傳用戶:dalidala
本教程旨在考察標(biāo)定運(yùn)算放大器的增益和帶寬的常用方法。需要指出的是,本討論適用于電壓反饋(VFB)型運(yùn)算放大器——電流反饋(CFB)型運(yùn)算放大器將在以后的教程(MT-034)中討論。
標(biāo)簽: 電壓反饋 增益 帶寬 運(yùn)算放大器
上傳時(shí)間: 2013-11-15
上傳用戶:大三三
A fully differential amplifi er is often used to converta single-ended signal to a differential signal, a designwhich requires three signifi cant considerations: theimpedance of the single-ended source must match thesingle-ended impedance of the differential amplifi er,the amplifi er’s inputs must remain within the commonmode voltage limits and the input signal must be levelshifted to a signal that is centered at the desired outputcommon mode voltage.
上傳時(shí)間: 2013-11-09
上傳用戶:wweqas
Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage, most of the amplifi er designshave incorporated differential inputs and outputs to regainand maximize total output signal swing. Since many lowvoltageapplications are single-ended, the questions arise,“How can I use a differential I/O amplifi er in a single-endedapplication?” and “What are the implications of suchuse?” This Design Note addresses some of the practicalimplications and demonstrates specifi c single-endedapplications using the 3GHz gain-bandwidth LTC6406differential I/O amplifi er.
標(biāo)簽: 單端應(yīng)用 差分 放大器
上傳時(shí)間: 2013-11-23
上傳用戶:rocketrevenge
差壓式流量計(jì)的測量原理是基于流體的機(jī)械能相互轉(zhuǎn)換的原理。在水平管道中流動(dòng)的流體,具有動(dòng)壓能和靜壓能(位能相等),在一定條件下,這兩種形式的能量可以相互轉(zhuǎn)換,但能量總和不變。
上傳時(shí)間: 2013-11-10
上傳用戶:ccccccc
設(shè)計(jì)了水聲信號(hào)發(fā)生系統(tǒng)中的功率放大電路,可將前級(jí)電路產(chǎn)生的方波信號(hào)轉(zhuǎn)換為正弦信號(hào),同時(shí)進(jìn)行濾波、功率放大,使其滿足換能器對(duì)輸入信號(hào)的要求。該電路以單片機(jī)AT89C52,集成6階巴特沃思低通濾波芯片MF6以及大功率運(yùn)算放大器LM12為核心,通過標(biāo)準(zhǔn)RS232接口與PC進(jìn)行通信,實(shí)現(xiàn)信號(hào)增益的程控調(diào)節(jié),對(duì)干擾信號(hào)具有良好的抑制作用。經(jīng)調(diào)試該電路工作穩(wěn)定正常,輸出波形無失真,在輸出功率以及放大增益、波紋系數(shù)等方面均滿足設(shè)計(jì)要求。 This paper presented a design and implementation of underwater acoustic power amplifer. This circuit converted the rectangle signal generated by frontend circuit into the sine signal, then filtered and power amplification, it meets the requirements of the transducer.Included AT89C52, 6th order Butterworth filter MF6, hipower amplififier LM12.Communication with PC through the RS232 port. The signal gain is adjustable and could be remote controlled. It has a good inhibitory effect on the interference signal. After debugged, this circuit works stable, the output waveform has no distortion, it meets the design requirement in outprt power, amplifier gain and ripple factor.
上傳時(shí)間: 2013-11-20
上傳用戶:qwe1234
零漂移放大器可動(dòng)態(tài)校正其失調(diào)電壓并重整其噪聲密度。自穩(wěn)零型和斬波型是兩種常用類型,可實(shí)現(xiàn) nV 級(jí)失調(diào)電壓和極低的失調(diào)電壓時(shí)間/溫度漂移。放大器的 1/f 噪聲也視為直流誤差,也可一并消除。零漂移放大器為設(shè)計(jì)師提供了很多好處:首先,溫漂和 1/f 噪聲在系統(tǒng)中始終起著干擾作用,很難以其它方式消除,其次,相對(duì)于標(biāo)準(zhǔn)的放大器,零漂移放大器具有較高的開環(huán)增益、電源抑制比和共模抑制比,另外,在相同的配置下,其總輸出誤差低于采用標(biāo)準(zhǔn)精密放大器的輸出誤差
標(biāo)簽: 工程師 零漂移 運(yùn)算放大器
上傳時(shí)間: 2013-11-23
上傳用戶:kristycreasy
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