運(yùn)算放大器作為模擬集成電路設(shè)計(jì)的基礎(chǔ),同時(shí)作為DAC校準(zhǔn)電路的一部分,本次設(shè)計(jì)一個(gè)高增益全差分跨導(dǎo)型運(yùn)算放大器。
標(biāo)簽: 增益 運(yùn)算 放大器設(shè)計(jì)
上傳時(shí)間: 2013-10-31
上傳用戶:dvfeng
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)中采用了三級級聯(lián)增加?xùn)艑挼碾娐方Y(jié)構(gòu),通過前級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
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)輸入引腳使信號反相,另一個(gè)輸入引腳則保持信號的相位。運(yùn)算放大器的標(biāo)準(zhǔn)符號如圖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
Photodiodes can be broken into two categories: largearea photodiodes with their attendant high capacitance(30pF to 3000pF) and smaller area photodiodes withrelatively low capacitance (10pF or less). For optimalsignal-to-noise performance, a transimpedance amplifi erconsisting of an inverting op amp and a feedback resistoris most commonly used to convert the photodiode currentinto voltage. In low noise amplifi er design, large areaphotodiode amplifi ers require more attention to reducingop amp input voltage noise, while small area photodiodeamplifi ers require more attention to reducing op amp inputcurrent noise and parasitic capacitances.
上傳時(shí)間: 2013-10-28
上傳用戶:hanbeidang
This application note is an overview discussion of theLinear Technology SPICE macromodel library. It assumeslittle if any prior knowledge of this software library or itshistory. However, it does assume familiarity with both theanalog simulation program SPICE (or one of its manyderivatives), and modern day op amps, including bipolar,JFET, and MOSFET amplifier technologies
標(biāo)簽: LTC 運(yùn)算放大器 模型
上傳時(shí)間: 2013-11-14
上傳用戶:zhanditian
This note describes some of the unique IC design techniques incorporated into a fast, monolithic power buffer, the LT1010. Also, some application ideas are described such as capacitive load driving, boosting fast op amp output current and power supply circuits.
標(biāo)簽: BUFFER 運(yùn)算 放大器設(shè)計(jì)
上傳時(shí)間: 2013-11-12
上傳用戶:671145514
設(shè)計(jì)了水聲信號發(fā)生系統(tǒng)中的功率放大電路,可將前級電路產(chǎn)生的方波信號轉(zhuǎn)換為正弦信號,同時(shí)進(jìn)行濾波、功率放大,使其滿足換能器對輸入信號的要求。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)信號增益的程控調(diào)節(jié),對干擾信號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
利用MOS場效應(yīng)管(MOSFET),采取AB類推挽式功率放大方式,采用傳輸線變壓器寬帶匹配技術(shù),設(shè)計(jì)出一種寬頻帶高功率射頻脈沖功率放大器模塊,其輸出脈沖功率達(dá)1200W,工作頻段0.6M~10MHz。調(diào)試及實(shí)用結(jié)果表明,該放大器工作穩(wěn)定,性能可靠
上傳時(shí)間: 2013-11-17
上傳用戶:waitingfy
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