Transcription of 全差分运算放大器设计 - big-bit.com
1 VLSI 2003 12 31 : , 1 (011021361) (021021061) CMOS 2P2M z : >80dB z : >50 MHz z : =5pF z : >60 z : >12dB z : >200Vs z : (VDD=5V) z : >10 MHz z : 20nVHz z : <10mV z : > 4V Vin+Vin-Vb1Vo-Vo+Vb3Vb2 CCRCCCRCM1M2M3M4M5M6M7M8M11M12M9M10 VcmfbM13 CLCL 1 VLSI 2003 12 31 : , 2 : (a) two-stage (b) folded - cascode ; (c) telescopic 4V NMOS ,DSAT NV PMOS ,DSAT PV 1 Miller cascode 1.
2 Adm>80dB 1 cascode M1 M8 2 (M9-M12) ()135111131355751335 7//mm mmom moomoomoomoogggAGR ggrrgrrggg g gg= = = +, ()92229911911//mmom o ooogAGR grrgg= = = + 413591251335 7 91110 (80)mm mmoverallmoomoo ooggggAAAdBggg ggg g g= = ++ 2. 200 V/us Slew Rate SR: z : max1max|2|CCoutDSCCIdvISRdtCC == 1umCgC = 1 CmuCg = 11111112222 DSDSuDSueffuDSCmeffII ISRVICgV == = = 1112()DSeffGSthpoxIVVVWCL = = M1 Veff1 z : max9max|2|CCoutDSCCLIdvISRdtCCC ==+ 1392min{,}DSDSCCLIISRCCC=+ 3.
3 : 15mW VLSI 2003 12 31 : , 391013()()staticddssDSDSDSPVVIII= ++ 2 100 A 2900 A 4. 20 nV/HZ(thermal noise) 2224( )3 DSfmimoxKgSKTgfWLC=+ 1/f 22227,1712mninnnmgvvvg =+ 5. 60 50 MHz Cc p1 p2 1p <<2p u 90 60 30 60 ,PM 190 2118030PM = 2tan 30up , 22pu = 2 NMOS j uj 1p2p1 2 S-Plane 3 S VLSI 2003 12 31.
4 , 4 ()()1135751335 7911359359911(1)ooo omoomoooommpmmmm CCoogg ggggg ggg g gggggggCCgg +++ ++ 135951335 7 911mm mmomoomoo ooggggAggg g gg g g=++ 11muopCgAC = = p2 Telescopic 1 cascode M1 M3 3,3113mp cascodegsgddbsbgCCCC =+++ 2 ()()151335 791112359(1)moomooooopCmmmCggg ggg g gGACgggC ++==+ A2CC 3 CL 92outCmCpopCpLeqLCpCgCCGCCCCCCC +==+++ 9mCLCLpCpgCCC CC CC=++ M9 1135pgs db dbCC C C=++ pLCC<< 9outmCpLCLpgCCC CC + CpCC>> 9outmpLgC = : VLSI 2003 12 31 : , 5 ()()151335 7911359moomoooopmmmCggg ggg g ggggC ++= 29mpLgC = 333113mpgsgddbsbgCCCC =+++ 6.
5 : CMFB [1]: z z z z z 4 [1] [7] Vin+Vin-Vb1Vb3Vb2M1M2M3M4M5M6M7M8M14 VcmfbM13M17M18M19M20M15 VcmM16 Common ModeAmplifierDifferential ModeAmplifier 4 VLSI 2003 12 31 : , 67.
6 Vb1Vb2Vb1MB5MB7MB8MB6MB1MB13MB14MB2 IbiasMB3MB4MB10MB11MB12MB9 5 5 123 BBBWW WLL L == 5613781444 BBB BBBBWWW WWW WLLL LLL L == === = 1011124 BBBWW WLL L == 8. Miller RC I RC 91mg II 2p 12zp = 91111()mLCCmgCCRg = VLSI 2003 12 31 : , 7 61(1)LCmCCRgC=+ III u 20 > 91 CmRg>> 1zCCRC 1muCgC CSMC : 2119/noxCAV = = , NVV= , PVV= 1.
7 Miller 60 , 2p z 10zu 22pu 9110mmccggCC ,912mmLcggCC 51 CLCCpFpF = = 2 CCpF= 2. () CV uspfuA = = = 1200 DSIA = ,14,13400 DSDSIIA == ()1110088002 DSCLCMFBSRICCCV us pfuA= ++ = =, 11900 DSIA = 3. gm Slew Rate 111111123 ISRVICgV = ===, M1 1622 50 10effuSRVsVV === , M1 == = VLSI 2003 12 31 : , 81112()mpoxDSWgCIL = 122166( )()() 10200 10 WWmLL === 2180() ()2 WWmLLm == 22up = 912mmLCggCC= M9 = = = 9992()mnoxDSWgCIL = () () 119 10900 10mWL == , 9100()1 WmLm = M9 991922 === 4.
8 cascode M13 M11 M12 M7 M8 cascode M3-M6 Veff= , 613132621322 400 10() === 13160()1 WmLm = 11111313()94()DSDSWILWIL== 1112139()()() WLLL== = 1112360() ()1 WWmLLm == M11-M12 , , 677262,722 300 10() === 7860() ()1 WWmLLm == , , 655262,522 300 10() === 5660() ()1 WWmLLm == , , 633262,322 300 10() === 34120() ()1 WWmLLm == cascode M3 6133322 300 === 5. Miller RC u = VLSI 2003 12 31 : , 96.
9 MOS Vb1-Vb4 ()1,,13() V VV VV= + = + = 2,,1,1,3,,,1,1,,3()()bIN COMSGSDSGIN COMTH PeffSDTH PeffVVV V V VV V V V V=+ =++ + ( ) ( ) VVVVV=+ + + = 3, ,7, NDSDSVV V VVV V=++= + = 4, , VV V V=+= += Ibias=25uA MB1-MB12 123102BB BWW WmLLL m === 59101 BBWmLm = = 10 1251 BWmLm = 7. cascode 14131601 WWmLLm == 1516114022 WWW mLLLm === = 1711002WW mLLm === 18328031 WWmLLm === 1920524031WW W mLLLm == = 8.
10 NMOS PMOS np == 1351151335 7 911mm mmomoomoo ooggggAggg g gg g g=++ () ()21 3 4135913111311221111513313101644mm mmmm mDSDSDSDSmDSmDSgggggggIIIIgIgI == ++ CSMC m =, = L 1m VLSI 2003 12 31 : , 10 SPICE 1 DC AC MOS SPICE 1 MOS W/L IDS Veff W/L IDS Veff M1 M2 M17 80m /2m 200A 100m /2m 227A M3 M4 120m /1m 300A 120m /1m 341A M5 M6 60m /1m 300A 60m /1m 341A M7 M8 60m /1m 300A 60m /1m 341A M9 M10 100m /1m 900A 100m /1m 1000A M11 M12 360m /1m 900A 300m /1m 1000A M13 M14 160m /1m 400A 160m /1m 454A M15 M16 40m /2m 100A
