paulmdrdo
Full Member level 3
So I want to design and simulate an CMOS op amp in LTspice using a spice model shown below. I'm really having a hard time sizing the transistors because I have no idea what KP should I use.
I did a setup in LTspice to extract what the KP of this model is. I just want to know if this is the right method on extracting this KP value.
By hand calculation
This does not match what was shown in the simulation
I'm really having a hard time determining this KP. Please help me! Thank you!
Code:
* BSIM3 models for AMI Semiconductor's C5 process
*
* Don't forget the .options scale=300nm if using drawn lengths
* and the MOSIS SUBM design rules
*
* 2<Ldrawn<500 10<Wdrawn<10000 Vdd=5V
* Note minimum L is 0.6 um while minimum W is 3 um
* Change to level=49 when using HSPICE or SmartSpice
.MODEL NMOS NMOS ( LEVEL = 8
+VERSION = 3.1 TNOM = 27 TOX = 1.39E-8
+XJ = 1.5E-7 NCH = 1.7E17 VTH0 = 0.6696061
+K1 = 0.8351612 K2 = -0.0839158 K3 = 23.1023856
+K3B = -7.6841108 W0 = 1E-8 NLX = 1E-9
+DVT0W = 0 DVT1W = 0 DVT2W = 0
+DVT0 = 2.9047241 DVT1 = 0.4302695 DVT2 = -0.134857
+U0 = 458.439679 UA = 1E-13 UB = 1.485499E-18
+UC = 1.629939E-11 VSAT = 1.643993E5 A0 = 0.6103537
+AGS = 0.1194608 B0 = 2.674756E-6 B1 = 5E-6
+KETA = -2.640681E-3 A1 = 8.219585E-5 A2 = 0.3564792
+RDSW = 1.387108E3 PRWG = 0.0299916 PRWB = 0.0363981
+WR = 1 WINT = 2.472348E-7 LINT = 3.597605E-8
+XL = 0 XW = 0 DWG = -1.287163E-8
+DWB = 5.306586E-8 VOFF = 0 NFACTOR = 0.8365585
+CIT = 0 CDSC = 2.4E-4 CDSCD = 0
+CDSCB = 0 ETA0 = 0.0246738 ETAB = -1.406123E-3
+DSUB = 0.2543458 PCLM = 2.5945188 PDIBLC1 = -0.4282336
+PDIBLC2 = 2.311743E-3 PDIBLCB = -0.0272914 DROUT = 0.7283566
+PSCBE1 = 5.598623E8 PSCBE2 = 5.461645E-5 PVAG = 0
+DELTA = 0.01 RSH = 81.8 MOBMOD = 1
+PRT = 8.621 UTE = -1 KT1 = -0.2501
+KT1L = -2.58E-9 KT2 = 0 UA1 = 5.4E-10
+UB1 = -4.8E-19 UC1 = -7.5E-11 AT = 1E5
+WL = 0 WLN = 1 WW = 0
+WWN = 1 WWL = 0 LL = 0
+LLN = 1 LW = 0 LWN = 1
+LWL = 0 CAPMOD = 2 XPART = 0.5
+CGDO = 2E-10 CGSO = 2E-10 CGBO = 1E-9
+CJ = 4.197772E-4 PB = 0.99 MJ = 0.4515044
+CJSW = 3.242724E-10 PBSW = 0.1 MJSW = 0.1153991
+CJSWG = 1.64E-10 PBSWG = 0.1 MJSWG = 0.1153991
+CF = 0 PVTH0 = 0.0585501 PRDSW = 133.285505
+PK2 = -0.0299638 WKETA = -0.0248758 LKETA = 1.173187E-3
+AF = 1 KF = 0)
*
.MODEL PMOS PMOS ( LEVEL = 8
+VERSION = 3.1 TNOM = 27 TOX = 1.39E-8
+XJ = 1.5E-7 NCH = 1.7E17 VTH0 = -0.9214347
+K1 = 0.5553722 K2 = 8.763328E-3 K3 = 6.3063558
+K3B = -0.6487362 W0 = 1.280703E-8 NLX = 2.593997E-8
+DVT0W = 0 DVT1W = 0 DVT2W = 0
+DVT0 = 2.5131165 DVT1 = 0.5480536 DVT2 = -0.1186489
+U0 = 212.0166131 UA = 2.807115E-9 UB = 1E-21
+UC = -5.82128E-11 VSAT = 1.713601E5 A0 = 0.8430019
+AGS = 0.1328608 B0 = 7.117912E-7 B1 = 5E-6
+KETA = -3.674859E-3 A1 = 4.77502E-5 A2 = 0.3
+RDSW = 2.837206E3 PRWG = -0.0363908 PRWB = -1.016722E-5
+WR = 1 WINT = 2.838038E-7 LINT = 5.528807E-8
+XL = 0 XW = 0 DWG = -1.606385E-8
+DWB = 2.266386E-8 VOFF = -0.0558512 NFACTOR = 0.9342488
+CIT = 0 CDSC = 2.4E-4 CDSCD = 0
+CDSCB = 0 ETA0 = 0.3251882 ETAB = -0.0580325
+DSUB = 1 PCLM = 2.2409567 PDIBLC1 = 0.0411445
+PDIBLC2 = 3.355575E-3 PDIBLCB = -0.0551797 DROUT = 0.2036901
+PSCBE1 = 6.44809E9 PSCBE2 = 6.300848E-10 PVAG = 0
+DELTA = 0.01 RSH = 101.6 MOBMOD = 1
+PRT = 59.494 UTE = -1 KT1 = -0.2942
+KT1L = 1.68E-9 KT2 = 0 UA1 = 4.5E-9
+UB1 = -6.3E-18 UC1 = -1E-10 AT = 1E3
+WL = 0 WLN = 1 WW = 0
+WWN = 1 WWL = 0 LL = 0
+LLN = 1 LW = 0 LWN = 1
+LWL = 0 CAPMOD = 2 XPART = 0.5
+CGDO = 2.9E-10 CGSO = 2.9E-10 CGBO = 1E-9
+CJ = 7.235528E-4 PB = 0.9527355 MJ = 0.4955293
+CJSW = 2.692786E-10 PBSW = 0.99 MJSW = 0.2958392
+CJSWG = 6.4E-11 PBSWG = 0.99 MJSWG = 0.2958392
+CF = 0 PVTH0 = 5.98016E-3 PRDSW = 14.8598424
+PK2 = 3.73981E-3 WKETA = 5.292165E-3 LKETA = -4.205905E-3
+AF = 1 KF = 0)I did a setup in LTspice to extract what the KP of this model is. I just want to know if this is the right method on extracting this KP value.
By hand calculation
This does not match what was shown in the simulation
I'm really having a hard time determining this KP. Please help me! Thank you!
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