本教程旨在考察标定运算放大器的增益和带宽的常用方法。需要指出的是,本讨论适用于电压反馈(VFB)型运算放大器——电流反馈(CFB)型运算放大器将在以后的教程(MT-034)中讨论。
上传时间: 2013-11-15
上传用户: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.
上传时间: 2013-10-28
上传用户: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
上传时间: 2013-11-14
上传用户: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.
上传时间: 2013-11-12
上传用户:671145514
设计了水声信号发生系统中的功率放大电路,可将前级电路产生的方波信号转换为正弦信号,同时进行滤波、功率放大,使其满足换能器对输入信号的要求。该电路以单片机AT89C52,集成6阶巴特沃思低通滤波芯片MF6以及大功率运算放大器LM12为核心,通过标准RS232接口与PC进行通信,实现信号增益的程控调节,对干扰信号具有良好的抑制作用。经调试该电路工作稳定正常,输出波形无失真,在输出功率以及放大增益、波纹系数等方面均满足设计要求。 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.
上传时间: 2013-11-20
上传用户:qwe1234
零漂移放大器可动态校正其失调电压并重整其噪声密度。自稳零型和斩波型是两种常用类型,可实现 nV 级失调电压和极低的失调电压时间/温度漂移。放大器的 1/f 噪声也视为直流误差,也可一并消除。零漂移放大器为设计师提供了很多好处:首先,温漂和 1/f 噪声在系统中始终起着干扰作用,很难以其它方式消除,其次,相对于标准的放大器,零漂移放大器具有较高的开环增益、电源抑制比和共模抑制比,另外,在相同的配置下,其总输出误差低于采用标准精密放大器的输出误差
上传时间: 2013-11-23
上传用户:kristycreasy
利用MOS场效应管(MOSFET),采取AB类推挽式功率放大方式,采用传输线变压器宽带匹配技术,设计出一种宽频带高功率射频脉冲功率放大器模块,其输出脉冲功率达1200W,工作频段0.6M~10MHz。调试及实用结果表明,该放大器工作稳定,性能可靠
上传时间: 2013-11-17
上传用户:waitingfy
摘要本设计以VCA822、MSP430F2012、DAC7611芯片为核心,加以其它辅助电路实现对宽带电压放大器的电压放大倍数、输出电压进行精确控制。放大器的电压放大倍数从0.2倍到20倍以0.1倍为步进设定,输出电压从6mv到600mv以1mv为步进设定,控制误差不大于5%,放大器的带宽大于15MHz。键盘和显示电路实现人机交互,完成对电压放大倍数和输出电压的设定和显示。关键词:程控放大器;高精度;控制电压;电压变换;D/A;A/D。
上传时间: 2013-11-16
上传用户:iswlkje
通过安装和调试ECG放大器,了解医学信号放大器的特点,并掌握放大器的有关指标。 安装和调试后的ECG放大器,应达到以下指标: 1?具有较高输入阻抗>1MΩ 2?放大器差动增益约为1000 3?具有较高共模抑制比(CMRR>80db) 4?等效输入噪声<10μV 5?频带范围0.05Hz~100Hz
上传时间: 2013-10-18
上传用户:taiyang250072
设计了一种用于高速ADC中的全差分套筒式运算放大器.从ADC的应用指标出发,确定了设计目标,利用开关电容共模反馈、增益增强等技术实现了一个可用于12 bit精度、100 MHz采样频率的高速流水线(Pipelined)ADC中的运算放大器.基于SMIC 0.13 μm,3.3 V工艺,Spectre仿真结果表明,该运放可以达到105.8 dB的增益,单位增益带宽达到983.6 MHz,而功耗仅为26.2 mW.运放在4 ns的时间内可以达到0.01%的建立精度,满足系统设计要求.
上传时间: 2013-10-16
上传用户:563686540