Guten Morgen Werner und Rainer,
Spice ist ein Simulationsprogramm, das der Wirklichkeit meist sehr nahen kommt.
Ich habe lange gesucht bis ich ein Modell für den LM1875 von 2012 gefunden habe. Es ist sehr kompliziert, weil im Chip ja auch viel drin ist.
Hier
"* LM1875
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* © Copyright 2012 Texas Instruments Incorporated. All rights reserved.
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** This model is designed as an aid for customers of Texas Instruments.
** TI and its licensors and suppliers make no warranties, either expressed
** or implied, with respect to this model, including the warranties of
** merchantability or fitness for a particular purpose. The model is
** provided solely on an "as is" basis. The entire risk as to its quality
** and performance is with the customer.
*****************************************************************************
*
** Released by: WEBENCH® Design Center, Texas Instruments Inc.
* Part: LM1875
* Date: 3/29/2012
* Model Type: All In One
* Simulator: Pspice
* Simulator Version: Pspice 16.0.0.p001
* EVM Order Number: N/A
* EVM Users Guide: N/A
* Datasheet: SNAS524A
*
* Model Version: 1.0
*
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*
* Updates:
*
* Version 1.0 : Release to Web
*
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* Notes:
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.SUBCKT LM1875_0 Vin Vip VSS VDD Vout
IS2 VDD 20 200N
IS3 19 VSS -200N
Vos 20 12 1M
XU4 GNDF VSS 8 9 GNDF PSRR_0
+ PARAMS: PSRR=90 FPSRR=500
XU5 VDD GNDF 9 10 GNDF PSRR_0
+ PARAMS: PSRR=95 FPSRR=20K
XU_VNOISE 11 12 VNSE_0
+ PARAMS: NLF=10 FLW=4 NVR=3000
XU2 15 13 14 GNDF VDD GBW_SLEW_SE_0
+ PARAMS: AOL=90 GBW=5.5MEG SRP=8MEG SRN=8MEG IT=1M VON=0.5 ROFF=1M
XU3 17 16 VDD OUT_CURRENT_CLAMP_PD_0
+ PARAMS: RON=0.1 ROFF=100MEG VON=0.5 IMAX=4 IMIN=-4
XU_TF 14 18 GNDF TF_0
+ PARAMS: FZ1=10G FZ2=10G FZ3=10G FZ4=10G FZ5=10G FP1=10E6 FP2=10G FP3=10G
+ FP4=10G
XU1 VDD VSS VDD IQ_IOFF_0
+ PARAMS: VON=0.5 IQQ=70M IOFF=0.2M
XD4 VSS 19 IDEAL_DIODE_0
+ PARAMS: EMCO=0.01 BRKV=60 IBRKV=1M
XD3 19 VDD IDEAL_DIODE_0
+ PARAMS: EMCO=0.01 BRKV=60 IBRKV=1M
XD2 VSS 20 IDEAL_DIODE_0
+ PARAMS: EMCO=0.01 BRKV=60 IBRKV=1M
XD1 20 VDD IDEAL_DIODE_0
+ PARAMS: EMCO=0.01 BRKV=60 IBRKV=1M
XU_GND VDD VSS GNDF GND_FLOAT_0
XU6 16 Vout Vimon AMETER_0
+ PARAMS: GAIN=1
XU_CLAW VDD VSS 18 17 Vimon GNDF VCLAMP_W_SENSE_0
+ PARAMS: VMAXIO=1 VMINIO=1 SLOPE=0
XU2_VCLAMP VDD VSS 19 13 GNDF VCLAMP_0
+ PARAMS: VMAX=0.1 VMIN=0.1
XU1_VCLAMP VDD VSS 20 15 GNDF VCLAMP_0
+ PARAMS: VMAX=0.1 VMIN=0.1
XU_CMRR 10 19 GNDF CMRR_0
+ PARAMS: CMRR=110 FCMRR=20
XUINPUT Vip Vin 11 8 GNDF INPUT_0
+ PARAMS: RCM=1 CCM=1000F CDM=100F
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT PSRR_0 VDD VSS VI VO GNDF PARAMS: PSRR = 130 FPSRR = 1.6
.PARAM PI = 3.141592
.PARAM RPSRR = 1
.PARAM GPSRR = {PWR(10,-PSRR/20)/RPSRR}
.PARAM LPSRR = {RPSRR/(2*PI*FPSRR)}
G1 GNDF 1 VDD VSS {GPSRR}
R1 1 2 {RPSRR}
L1 2 GNDF {LPSRR}
E1 VO VI 1 GNDF 1
C2 VDD VSS 10P
.ENDS
* BEGIN PROG NSE NANO VOLT/RT-HZ
.SUBCKT VNSE_0 1 2 PARAMS: NLF = 10 FLW = 4 NVR = 4.6
* BEGIN SETUP OF NOISE GEN - NANOVOLT/RT-HZ
* INPUT THREE VARIABLES
* SET UP VNSE 1/F
********************
* NV/RHZ AT 1/F FREQ
* NLF
********************
* FREQ FOR 1/F VAL
* FLW
********************
* SET UP VNSE FB
* NV/RHZ FLATBAND
* NVR
********************
* END USER INPUT
* START CALC VALS
.PARAM GLF={PWR(FLW,0.25)*NLF/1164}
.PARAM RNV={1.184*PWR(NVR,2)}
.MODEL DVN D KF={PWR(FLW,0.5)/1E11} IS=1.0E-16
* END CALC VALS
I1 0 7 10E-3
I2 0 8 10E-3
D1 7 0 DVN
D2 8 0 DVN
E1 3 6 7 8 {GLF}
R1 3 0 1E9
R2 3 0 1E9
R3 3 6 1E9
E2 6 4 5 0 10
R4 5 0 {RNV}
R5 5 0 {RNV}
R6 3 4 1E9
R7 4 0 1E9
E3 1 2 3 4 1
C1 1 0 1E-15
C2 2 0 1E-15
C3 1 2 1E-15
.ENDS
* END PROG NSE NANOV/RT-HZ
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT GBW_SLEW_SE_0 VIP VIM VO GNDF PD
+ PARAMS: AOL = 100 GBW = 1MEG SRP = 1MEG SRN = 1MEG IT = 1M
+ VON = 0.5 ROFF = 1M
.PARAM PI = 3.141592
.PARAM IP = {IF(SRP <= SRN,IT,IT*(SRP/SRN))}
.PARAM IN = {IF(SRN <= SRP,-IT,-IT*(SRN/SRP))}
.PARAM CC = {IF(SRP <= SRN,IT/SRP,IT/SRN)}
.PARAM FP = {GBW/PWR(10,AOL/20)}
.PARAM RC = {1/(2*PI*CC*FP)}
.PARAM GC = {PWR(10,AOL/20)/RC}
G1 GNDF VO VALUE = {IF(V(PD) >= VON,LIMIT(GC*V(VIP,VIM),IP,IN),0)}
C1 VO GNDF {CC}
GR1 VO GNDF VALUE = {IF(V(PD) >= VON,V(VO,GNDF)/RC,V(VO,GNDF)/ROFF)}
GR11 VO GNDF VALUE = {V(VO,GNDF)/(RC*100)}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT OUT_CURRENT_CLAMP_PD_0 IN OUT PD
+PARAMS: RON = 1 ROFF = 1G VON = 0.5 IMAX = 10M IMIN = -10M
GRES IN OUT VALUE = {LIMIT(IF(V(PD) >= VON,1,0)*V(IN,OUT)/RON
+ + IF(V(PD) >= VON,0,1)*V(IN,OUT)/ROFF,IMAX,IMIN)}
.ENDS
.SUBCKT TF_0 VI VO GNDF
+ PARAMS: FZ1 = 10G FZ2 = 10G FZ3 = 10G FZ4 = 10G FZ5 = 10G
+ FP1 = 1 FP2 = 10G FP3 = 10G FP4 = 10G
.PARAM GM = 1M
.PARAM RO = {1/GM}
.PARAM PI = 3.141592
GP1 GNDF VP1 VI GNDF {GM}
GRP1 VP1 GNDF VALUE = {V(VP1,GNDF)/RO}
CP1 VP1 GNDF {1/(2*PI*RO*FP1)}
GP2 GNDF VP2 VP1 GNDF {GM}
GRP2 VP2 GNDF VALUE = {V(VP2,GNDF)/RO}
CP2 VP2 GNDF {1/(2*PI*RO*FP2)}
GP3 GNDF VP3 VP2 GNDF {GM}
GRP3 VP3 GNDF VALUE = {V(VP3,GNDF)/RO}
CP3 VP3 GNDF {1/(2*PI*RO*FP3)}
GP4 GNDF VP4 VP3 GNDF {GM}
GRP4 VP4 GNDF VALUE = {V(VP4,GNDF)/RO}
CP4 VP4 GNDF {1/(2*PI*RO*FP4)}
GZ1 GNDF VZ1 VP4 GNDF {GM}
GRZ1 VZ1 VX1 VALUE = {V(VZ1,VX1)/RO}
LZ1 VX1 GNDF {RO/(2*PI*FZ1)}
GZ2 GNDF VZ2 VZ1 GNDF {GM}
GRZ2 VZ2 VX2 VALUE = {V(VZ2,VX2)/RO}
LZ2 VX2 GNDF {RO/(2*PI*FZ2)}
GZ3 GNDF VZ3 VZ2 GNDF {GM}
GRZ3 VZ3 VX3 VALUE = {V(VZ3,VX3)/RO}
LZ3 VX3 GNDF {RO/(2*PI*FZ3)}
GZ4 GNDF VZ4 VZ3 GNDF {GM}
GRZ4 VZ4 VX4 VALUE = {V(VZ4,VX4)/RO}
LZ4 VX4 GNDF {RO/(2*PI*FZ4)}
GZ5 GNDF VO VZ4 GNDF {GM}
GRZ5 VO VX5 VALUE = {V(VO,VX5)/RO}
LZ5 VX5 GNDF {RO/(2*PI*FZ5)}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT IQ_IOFF_0 VDD VSS PD
+ PARAMS: VON = 0.5 IQQ = 1M IOFF = 1P
G1 VDD VSS VALUE = {IF(V(PD) >= VON,IQQ,IOFF)}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT IDEAL_DIODE_0 A C
+PARAMS: EMCO = 0.01 BRKV = 60 IBRKV = 1M
D1 A C IDIODE
.MODEL IDIODE D(N = {EMCO} BV = {BRKV} IBV = {IBRKV})
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT GND_FLOAT_0 VDD VSS GNDF
EGNDF GNDF 0 VALUE = {(V(VDD)+V(VSS))*0.5}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT AMETER_0 VI VO VIMON
+ PARAMS: GAIN = 1
VSENSE VI VO DC = 0
EMETER VIMON 0 VALUE = {I(VSENSE)*GAIN}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT VCLAMP_W_SENSE_0 VDD VSS VI VO VIMON GNDF
+ PARAMS: VMAXIO = 0.1 VMINIO = 0.1 SLOPE = 0
EPCLIP VDD_CLP 0 VALUE = {V(VDD,GNDF) - SLOPE*V(VIMON) - VMAXIO}
ENCLIP VSS_CLP 0 VALUE = {V(VSS,GNDF) - SLOPE*V(VIMON) + VMINIO}
*EPCLIP VDD_CLP 0 VALUE = {V(VDD,GNDF) - VMAXIO}
*ENCLIP VSS_CLP 0 VALUE = {V(VSS,GNDF) + VMINIO}
ECLAMP VO GNDF VALUE = {LIMIT(V(VI,GNDF), V(VDD_CLP), V(VSS_CLP))}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT VCLAMP_0 VDD VSS VI VO GNDF PARAMS: VMAX = 0.1 VMIN = 0.1
ECLAMP VO GNDF VALUE = {LIMIT(V(VI,GNDF),V(VDD,GNDF) - VMAX, V(VSS,GNDF) + VMIN)}
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT CMRR_0 VI VO GNDF PARAMS: CMRR = 130 FCMRR = 1.6K
.PARAM PI = 3.141592
.PARAM RCMRR = 1
.PARAM GCMRR = {PWR(10,-CMRR/20)/RCMRR}
.PARAM LCMRR = {RCMRR/(2*PI*FCMRR)}
G1 GNDF 1 VI GNDF {GCMRR}
R1 1 2 {RCMRR}
L1 2 GNDF {LCMRR}
E1 VI VO 1 GNDF 1
.ENDS
**************************************
** **
** **
** **
** **
**************************************
.SUBCKT INPUT_0 VIP VIN VOP VON GNDF PARAMS: RCM = 1 CCM = 100F CDM = 100F
C1 VOP GNDF {CCM}
C2 VON GNDF {CCM}
C3 VOP VON {CDM}
G1 VIP VOP VALUE = {V(VIP,VOP)/RCM}
G2 VIN VON VALUE = {V(VIN,VON)/RCM}
.ENDS
.END"
Heute nachmittag geht es weiter.
