第五章 集成运算放大电路
DESCRIPTION
第五章 集成运算放大电路. 5.1 集成放大电路的特点. 5.2 集成运放的主要技术指标. 5.3 集成运放的基本组成部分. 5.4 集成运放的典型电路. 5.5 各类集成运放的性能特点. 5.6 集成运放使用中的几个具体问题. 5.1 集成放大电路的特点. 集成电路简称 IC ( Integrated Circuit ). 数字集成电路. 集成电路按其功能分. 模拟集成电路. 集成运算放大器; 集成功率放大器;集成高频放大器 ;集成中频放大器 ; 集成比较器 ;集成乘法器; 集成稳压器 ;集成数 / 模和模 / 数转换器等。. - PowerPoint PPT PresentationTRANSCRIPT
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5.15.25.35.45.55.6
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5.1 IC (Integrated Circuit)//
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1. 2. 3. ()4. 5. NPN PNP PNP 10
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5.2 Aod Aod Aod 100 ~ 140 dB
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UIO UIO UIO 1 ~ 10 mVUIO 1 mV 10 ~ 20 V 0.5 V
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IIO IIO ~ 1 nA
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IIB rid KCMR 80 dB 160 dB
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UIcm UIdm - 3 dB fH Aod 3 dB fH
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BWGAod 0 dB 1 SR V / s SR
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5.35.3.1
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( Current Mirror) UBE1 = UBE2VT1 VT2 IB1 = IB2 = IBIC1 = IC2 = IC >> 2
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UBE1 + IE1R1 = UBE2 + IE2R2 UBE1 UBE2
- Re Re UBE2 < UBE1 IC2
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IC1 IC2 Re
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5.3.21. uId = 0UCQ1 = UCQ2UO = 0
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2. VT1 VT2 (uId)
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3. uId uIc(uIc)Ac Ad
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KCMR(1) KCMR KCMR(2) Ac = 0 KCMR = (3)
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1. Re Re Ac
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2. uId = 0 IBQ1 = IBQ2 = IBQICQ1 = ICQ2 = ICQ UBEQ1 = UBEQ2 = UBEQUCQ1 =UCQ2 = UCQ 1= 2= IBQR + UBEQ + 2IEQRe = VEEICQ IBQ
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3.
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1. VT3 iC1iC2
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2. VT3 Rb1
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3.
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1. (a)
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2. uO VT2 uO (b)
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3. 4 (c)
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4. VT2 (d)
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5.3.3 4.2.17VT1 VT2 VT3VT2
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(1) Ad Au Ad Ro = 2Rc Ro = Rc (2) KCMR (3) (4) (5) Rid 2(R + rbe)
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1. Ad 2.KCMR 3. 1. Ad 2. KCMR 3. 1. Ad 2.KCMR 3. 1. Ad 2. 3. 4.
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I io = ic4 - ic2 = 2ic4 io
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iB1
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rberbe 1rbe1
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1. 2. (a) NPN (b) PNP
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1. 1 2 rbe = rbe12. 1 2 rbe = rbe1 3.
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5.3.4 uI uI > 0VT1 VT2 iC1+VCC VT1 RL uI < 0VT2 VT1 iC2 RL VT2 -VCC uI iL uO
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1. 2. R1RR2VD1VD2
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VT3VT4
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VD3VD4Re1Re2 VD3VD4 VT1 IC1 URe1 VD3 IB1 IC1 VT1 VT2 IC2 URe2 VD4 IB2 IC2 VT2
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VT3VT4Re1Re2 Re IEm UD UBE Iem
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5.4 F007CMOS C145735.4.1 F007 F007 (a)(b)
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F007
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1. IREFI11IC10I3, 4IC9IC8IC12IC13 F007
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2. VT1VT2VT3VT4 - VT1VT2 VT5VT6 VT4 uORW R VT7 R2
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VT7 1. VT1VT2 2. VT3VT4 VT5VT6 3. VT3VT4 4.
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3. VT4 VT6 VT16 VT17 VT13 8930pF
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4. F007 VT14 VT18 VT19 VD1 VD2 R9R10 VT15 R7R8 R7R8 UBE
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6.5 1 ~ 2 ()
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1012 - 1 000 V/s 10 MHz
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A / D D / A -
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5.65.6.15.6.21.
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2. 3.
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5.6.31. (a) (b)
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2. VD1 VD23. VDZ1VDZ2
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* Aod = ro = 0 KCMR = rid = UIO = 0IIO = 0 UIO = IIO = 0 IIB = 0- 3 dB fH =
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1.
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2. rid = +UOPP-UOPP
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u+ > u- uO = + UOPP u+ < u- , uO = - UOPP1. uO (u+ - u-) u+ u- 2.
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Aod u+ u- Aod (u+ - u- )UOPPF007 Uopp = 14 VAod 2 105
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514PNP1