Download - 第四章 集成运算放大电路
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第四章 集成运算放大电路
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Shanghai Jiao Tong University
23/4/20 2
集成运放概述
Robert J. Widlar 正在观看 LM10 运算放大器的设计电路( 1977 )
运放, Op, Amp, OPA
第一片 IC 形式的运算放大器 uA709, 1965 年, Fairchild , Robert J. Widlar
经典的 uA741
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Shanghai Jiao Tong University
23/4/20 3
图 4.1.1 集成运放电路方框图
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23/4/20 4
图 4.1.2 集成运放的符号和电压传输特性
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23/4/20 5
集成运放中的电流源
镜镜镜镜镜
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23/4/20 6
图 4.2.2 比例电流源
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23/4/20 7
图 4.2.3 微电流源
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图 4.2.4 加射极输出器的电流源
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23/4/20 9
基本电流源一览
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23/4/20 10
图 4.2.5 威尔逊电流源
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23/4/20 11
图 4.2.6 基于比例电流源的多路电流源
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23/4/20 12
图 4.2.7 多集电极管构成的多路电流源
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23/4/20 13
图 4.2.8 MOS 管多路电流源
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23/4/20 14
图 4.2.9 F007 中的电流源电路
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图 4.2.10 有源负载共射放大电路
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图 4.2.11 有源负载差分放大电路
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23/4/20 17
图 4.3.1 F007 电路原理图
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23/4/20 18
图 4.3.2 F007 电路中的放大电路部分
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23/4/20 19
集成运放的主要性能指标
开环差模增益 Aod
共模抑制比 KCMR
差模输入阻抗 rid
输入失调电压 UIO 及其温漂 dUIO/dT
输入失调电流 IIO 及其温漂 dIIO/dT
最大共模输入电压 UIcmax
最大差模输入电压 UIdmax
-3dB 带宽 fH
单位增益带宽 fC
转换速率 SR
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4.4 集成运放的性能指标及低频等效电路
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图 4.4.2 简化的集成运放低频等效电路
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23/4/20 22
4.5 集成运放的种类及选择
General purposePrecisionLow-NoiseHigh speedLow Voltage, Low PowerOthers(Programmable Gain Amplifier , High Output Current Amplifier , Low Bias Current Amplifier , uPower, Rail-to-Rail )ASSP(Application Specific Standard Product)
NS 发布的 GHz 级的运放 LMH6703,LMH6704
NS2004 年发布的最薄的封装( 4 张复印纸的厚度 0.4mm )
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23/4/20 23
4.6 集成运放的使用
镜镜镜镜 DIP 镜镜镜镜 SO圆壳金属封装 TO-71
http://www.sumzi.com/en/articles/10/640.html
主要设计制造商
FairchildNational Semiconductor, NSMaximAnalog device, ADTexas Instrument, TI
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23/4/20 24
图 4.6.2 输入保护措施
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23/4/20 25
图 4.6.3 输出保护电路
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23/4/20 26
图 4.6.4 电源端保护
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23/4/20 27
提高输出电压的电路
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23/4/20 28
增大输出电流的措施
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23/4/20 29
参考网页
Analog Dialogue
Full Datasheet
21ic
www.analog.com/library/analogdialogue
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本章作业
4.1 , 4.3 , 4.5 , 4.7