#### marktait12

##### New Member

Hi, I'm trying to simulate a 38kHz signal to use an IR transmitter signal on Pspice with no luck. I have tried to use a 555 timer but now trying to resort back to just implementing the multivibrator. Would anyone be able to help determine what my issues are?

I have attached my circuit and below is the error message I get from PSpice.

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** CIRCUIT DESCRIPTION

******************************************************************************

** Creating circuit file "test.cir"

** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:

* Profile Libraries :

* Local Libraries :

* From [PSPICE NETLIST] section of C:\SPB_DATA\cdssetup\OrCAD_PSpice\17.4.0\PSpice.ini file:

.lib "nom.lib"

*Analysis directives:

.TRAN 0 200u 0

.OPTIONS ADVCONV

.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))

.INC "..\SCHEMATIC1.net"

**** INCLUDING SCHEMATIC1.net ****

* source CIRCUIT2

C_C8 0 N11131 100p TC=0,0

R_R13 0 N11279 1k TC=0,0

R_R11 N11171 VCC 1k TC=0,0

X_U4 0 N11131 N11279 VCC N11269 N11131 N11171 VCC 555C

R_R12 N11131 N11171 191k TC=0,0

C_C7 0 N11269 0.01u TC=0,0

V_V3 VCC 0 5v

R_R15 N14329 VCC 1k TC=0,0

R_R16 N14369 VCC 1.9k TC=0,0

R_R17 N14385 VCC 1.9k TC=0,0

R_R18 N14317 VCC 1k TC=0,0

C_C9 N14385 N14329 0.01u TC=0,0

C_C10 N14317 N14369 0.01u TC=0,0

Q_Q1 N14317 N14385 N14487 Q2PC4081Q/PLP

Q_Q2 N14329 N14369 N14487 Q2PC4081Q/PLP

R_R19 N14487 N14317 1k TC=0,0

R_R20 N14329 N14487 1k TC=0,0

R_R22 N16054 VCC 91k TC=0,0

R_R23 N16058 VCC 91k TC=0,0

R_R24 N16062 VCC 2.2k TC=0,0

Q_Q4 N16062 N16058 0 Q2PC4081Q/PLP

R_R25 N16050 0 1k TC=0,0

Q_Q3 N16050 N16054 0 Q2PC4081Q/PLP

R_R21 N16050 VCC 2.2k TC=0,0

C_C12 N16062 N16054 220n TC=0,0

R_R26 0 N16062 1k TC=0,0

C_C11 N16058 N16050 220n TC=0,0

R_R27 0 N14487 1G TC=0,0

**** RESUMING test.cir ****

.END

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** Diode MODEL PARAMETERS

******************************************************************************

X_U4.DIODE

IS 10.000000E-15

RS .01

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** BJT MODEL PARAMETERS

******************************************************************************

Q2PC4081Q/PLP

NPN

LEVEL 1

IS 15.330000E-15

BF 178.7

NF 1.002

VAF 69.7

IKF .1216

ISE 793.200000E-18

NE 1.436

BR 8.628

NR 1.004

VAR 44.7

IKR .1121

ISC 83.050000E-15

NC 1.207

ISS 0

RB 1

RBM 1

IRB 1.000000E-06

RE .361

RC 1.382

CJE 14.570000E-12

VJE .65

MJE .3393

CJC 3.511000E-12

VJC .4485

MJC .3646

XCJC .6193

CJS 0

VJS .75

MJS .333

FC .9256

TF 527.500000E-12

XTF 96.78

VTF 2.012

ITF .4793

TR 0

KF 0

AF 1

CN 2.42

D .87

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** Junction FET MODEL PARAMETERS

******************************************************************************

X_U4.JNEMOD

NJF

VTO -2.5

BETA 5.120000E-06

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** MOSFET MODEL PARAMETERS

******************************************************************************

X_U4.PCHAN555 X_U4.NCHAN555

PMOS NMOS

LEVEL 1 1

L 100.000000E-06 100.000000E-06

W 100.000000E-06 100.000000E-06

VTO -.2 .2

KP 20.000000E-06 20.000000E-06

GAMMA 0 0

PHI .6 .6

LAMBDA 0 0

IS 10.000000E-15 10.000000E-15

JS 0 0

PB .8 .8

PBSW .8 .8

CJ 0 0

CJSW 0 0

CGSO 1.000000E-12 1.000000E-12

CGDO 1.000000E-12 1.000000E-12

CGBO 1.000000E-12 1.000000E-12

TOX 0 0

XJ 0 0

UCRIT 10.000000E+03 10.000000E+03

DIOMOD 1 1

VFB 0 0

LETA 0 0

WETA 0 0

U0 0 0

TEMP 0 0

VDD 5 5

XPART 0 0

X_U4.PCHAN555_OUT

PMOS

LEVEL 1

L 100.000000E-06

W 100.000000E-06

VTO -.2

KP 20.000000E-06

GAMMA 0

PHI .6

LAMBDA 0

IS 10.000000E-15

JS 0

PB .8

PBSW .8

CBD 200.000000E-12

CJ 0

CJSW 0

CGSO 1.000000E-12

CGDO 1.000000E-12

CGBO 1.000000E-12

TOX 0

XJ 0

UCRIT 10.000000E+03

DIOMOD 1

VFB 0

LETA 0

WETA 0

U0 0

TEMP 0

VDD 5

XPART 0

Starting pseudo-transient algorithm.

ERROR -- Convergence problem in transient bias point calculation

Last node voltages tried were:

NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE

( VCC) 5.0000 (N11131) 3.2166 (N11171) 4.9907 (N11269) 3.3333

(N11279) 4.7109 (N14317) 5.0000 (N14329) 5.0000 (N14369) 5.0000

(N14385) 5.0000 (N14487) 5.0000 (N16050) 1.5625 (N16054) .0328

(N16058) .6699 (N16062) .0763 (X_U4.1) 431.7E-12 (X_U4.2) 1.6667

(X_U4.3)-15.50E+03 (X_U4.4) 4.2000 (X_U4.5) -.6665 (X_U4.6)-1167.0000

(X_U4.7) 4.2000 (X_U4.8) -.5995 (X_U4.9) 880.4E-06 (X_U4.10) 5.0000

(X_U4.11) .2891 (X_U4.12) 5.0000

(X_U4.13) 431.7E-12 (X_U4.14) 1.486E-09

(X_U4.15) 5.0000 (X_U4.16) 5.0000

(X_U4.17) 89.17E-12 (X_U4.18) 416.0E-12

(X_U4.19) 207.8E-12 (X_U4.20) 5.0000

(X_U4.21) .2005 (X_U4.22) 4.7957

(X_U4.23) .1336 (X_U4.24) 5.0000

(X_U4.25) 104.5E-12 (X_U4.VDD) 5.0000

These voltages failed to converge:

V(N11131) = 5.000V \ 3.217V

V(N11279) = 3.182V \ 4.711V

V(N11171) = 5.000V \ 4.991V

V(N16054) = 5.000V \ 32.77mV

V(N16062) = 75.35mV \ 76.26mV

V(X_U4.3) = -33.33KV \ -15.50KV

V(X_U4.23) = 103.77mV \ 133.55mV

V(X_U4.5) = -696.23mV \ -666.45mV

V(X_U4.6) = 16.67KV \ -1.167KV

V(X_U4.21) = 595.56mV \ 200.45mV

V(X_U4.8) = -204.44mV \ -599.55mV

V(X_U4.9) = 280.47mV \ 880.38uV

V(X_U4.11) = 1.818V \ 289.12mV

V(X_U4.20) = 4.822V \ 5.000V

V(X_U4.22) = 4.757V \ 4.796V

These supply currents failed to converge:

I(X_U4.E_EMIR) = -4.586mA \ -4.751mA

I(X_U4.E_EVAL) = 0A \ -10.34pA

I(X_U4.E_U6_E1CMP) = 3.333mA \ 1.550mA

I(X_U4.E_U7_E1CMP) = -1.667mA \ 116.72uA

I(V_V3) = -3.918mA \ -3.981mA

I(X_U4.V_U6_V2) = -3.333mA \ -1.550mA

I(X_U4.V_U7_V2) = 1.667mA \ -116.74uA

These devices failed to converge:

X_U4.D_U6_D1CLMP X_U4.D_U7_D1CLMP X_U4.M_U2_U1_M4 X_U4.M_U2_U1_M6

X_U4.M_U2_U1_M8 X_U4.M_U2_U1_M1 X_U4.M_U2_U1_M2 X_U4.M_U2_U1_M5

X_U4.M_U2_U2_M6 X_U4.M_U2_U2_M1 X_U4.M_U2_U2_M2 X_U4.M_U2_U2_M7

X_U4.M_U2_U3_M1 X_U4.M_U2_U3_M3 X_U4.M_U2_U4_M3 X_U4.M_U2_U4_M4

X_U4.M_U2_U5_M2 X_U4.M_U2_U5_M3 X_U4.M_U2_U5_M4 X_U4.M_U2_U6_M3

X_U4.M_U2_U7_M2 Q_Q3

ERROR(ORPSIM-15659): Discontinuing simulation due to convergence problem

**** Interrupt ****

Any help appreciated.

Regards,

Mark

I have attached my circuit and below is the error message I get from PSpice.

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** CIRCUIT DESCRIPTION

******************************************************************************

** Creating circuit file "test.cir"

** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:

* Profile Libraries :

* Local Libraries :

* From [PSPICE NETLIST] section of C:\SPB_DATA\cdssetup\OrCAD_PSpice\17.4.0\PSpice.ini file:

.lib "nom.lib"

*Analysis directives:

.TRAN 0 200u 0

.OPTIONS ADVCONV

.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))

.INC "..\SCHEMATIC1.net"

**** INCLUDING SCHEMATIC1.net ****

* source CIRCUIT2

C_C8 0 N11131 100p TC=0,0

R_R13 0 N11279 1k TC=0,0

R_R11 N11171 VCC 1k TC=0,0

X_U4 0 N11131 N11279 VCC N11269 N11131 N11171 VCC 555C

R_R12 N11131 N11171 191k TC=0,0

C_C7 0 N11269 0.01u TC=0,0

V_V3 VCC 0 5v

R_R15 N14329 VCC 1k TC=0,0

R_R16 N14369 VCC 1.9k TC=0,0

R_R17 N14385 VCC 1.9k TC=0,0

R_R18 N14317 VCC 1k TC=0,0

C_C9 N14385 N14329 0.01u TC=0,0

C_C10 N14317 N14369 0.01u TC=0,0

Q_Q1 N14317 N14385 N14487 Q2PC4081Q/PLP

Q_Q2 N14329 N14369 N14487 Q2PC4081Q/PLP

R_R19 N14487 N14317 1k TC=0,0

R_R20 N14329 N14487 1k TC=0,0

R_R22 N16054 VCC 91k TC=0,0

R_R23 N16058 VCC 91k TC=0,0

R_R24 N16062 VCC 2.2k TC=0,0

Q_Q4 N16062 N16058 0 Q2PC4081Q/PLP

R_R25 N16050 0 1k TC=0,0

Q_Q3 N16050 N16054 0 Q2PC4081Q/PLP

R_R21 N16050 VCC 2.2k TC=0,0

C_C12 N16062 N16054 220n TC=0,0

R_R26 0 N16062 1k TC=0,0

C_C11 N16058 N16050 220n TC=0,0

R_R27 0 N14487 1G TC=0,0

**** RESUMING test.cir ****

.END

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** Diode MODEL PARAMETERS

******************************************************************************

X_U4.DIODE

IS 10.000000E-15

RS .01

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** BJT MODEL PARAMETERS

******************************************************************************

Q2PC4081Q/PLP

NPN

LEVEL 1

IS 15.330000E-15

BF 178.7

NF 1.002

VAF 69.7

IKF .1216

ISE 793.200000E-18

NE 1.436

BR 8.628

NR 1.004

VAR 44.7

IKR .1121

ISC 83.050000E-15

NC 1.207

ISS 0

RB 1

RBM 1

IRB 1.000000E-06

RE .361

RC 1.382

CJE 14.570000E-12

VJE .65

MJE .3393

CJC 3.511000E-12

VJC .4485

MJC .3646

XCJC .6193

CJS 0

VJS .75

MJS .333

FC .9256

TF 527.500000E-12

XTF 96.78

VTF 2.012

ITF .4793

TR 0

KF 0

AF 1

CN 2.42

D .87

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** Junction FET MODEL PARAMETERS

******************************************************************************

X_U4.JNEMOD

NJF

VTO -2.5

BETA 5.120000E-06

**** 03/14/21 23:01:15 ******* PSpice 17.4.0 (Nov 2018) ******* ID# 0 ********

** Profile: "SCHEMATIC1-test" [ C:\Users\Mark\Desktop\EE318pro2\circuit2-pspicefiles\schematic1\test.sim ]

**** MOSFET MODEL PARAMETERS

******************************************************************************

X_U4.PCHAN555 X_U4.NCHAN555

PMOS NMOS

LEVEL 1 1

L 100.000000E-06 100.000000E-06

W 100.000000E-06 100.000000E-06

VTO -.2 .2

KP 20.000000E-06 20.000000E-06

GAMMA 0 0

PHI .6 .6

LAMBDA 0 0

IS 10.000000E-15 10.000000E-15

JS 0 0

PB .8 .8

PBSW .8 .8

CJ 0 0

CJSW 0 0

CGSO 1.000000E-12 1.000000E-12

CGDO 1.000000E-12 1.000000E-12

CGBO 1.000000E-12 1.000000E-12

TOX 0 0

XJ 0 0

UCRIT 10.000000E+03 10.000000E+03

DIOMOD 1 1

VFB 0 0

LETA 0 0

WETA 0 0

U0 0 0

TEMP 0 0

VDD 5 5

XPART 0 0

X_U4.PCHAN555_OUT

PMOS

LEVEL 1

L 100.000000E-06

W 100.000000E-06

VTO -.2

KP 20.000000E-06

GAMMA 0

PHI .6

LAMBDA 0

IS 10.000000E-15

JS 0

PB .8

PBSW .8

CBD 200.000000E-12

CJ 0

CJSW 0

CGSO 1.000000E-12

CGDO 1.000000E-12

CGBO 1.000000E-12

TOX 0

XJ 0

UCRIT 10.000000E+03

DIOMOD 1

VFB 0

LETA 0

WETA 0

U0 0

TEMP 0

VDD 5

XPART 0

Starting pseudo-transient algorithm.

ERROR -- Convergence problem in transient bias point calculation

Last node voltages tried were:

NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE

( VCC) 5.0000 (N11131) 3.2166 (N11171) 4.9907 (N11269) 3.3333

(N11279) 4.7109 (N14317) 5.0000 (N14329) 5.0000 (N14369) 5.0000

(N14385) 5.0000 (N14487) 5.0000 (N16050) 1.5625 (N16054) .0328

(N16058) .6699 (N16062) .0763 (X_U4.1) 431.7E-12 (X_U4.2) 1.6667

(X_U4.3)-15.50E+03 (X_U4.4) 4.2000 (X_U4.5) -.6665 (X_U4.6)-1167.0000

(X_U4.7) 4.2000 (X_U4.8) -.5995 (X_U4.9) 880.4E-06 (X_U4.10) 5.0000

(X_U4.11) .2891 (X_U4.12) 5.0000

(X_U4.13) 431.7E-12 (X_U4.14) 1.486E-09

(X_U4.15) 5.0000 (X_U4.16) 5.0000

(X_U4.17) 89.17E-12 (X_U4.18) 416.0E-12

(X_U4.19) 207.8E-12 (X_U4.20) 5.0000

(X_U4.21) .2005 (X_U4.22) 4.7957

(X_U4.23) .1336 (X_U4.24) 5.0000

(X_U4.25) 104.5E-12 (X_U4.VDD) 5.0000

These voltages failed to converge:

V(N11131) = 5.000V \ 3.217V

V(N11279) = 3.182V \ 4.711V

V(N11171) = 5.000V \ 4.991V

V(N16054) = 5.000V \ 32.77mV

V(N16062) = 75.35mV \ 76.26mV

V(X_U4.3) = -33.33KV \ -15.50KV

V(X_U4.23) = 103.77mV \ 133.55mV

V(X_U4.5) = -696.23mV \ -666.45mV

V(X_U4.6) = 16.67KV \ -1.167KV

V(X_U4.21) = 595.56mV \ 200.45mV

V(X_U4.8) = -204.44mV \ -599.55mV

V(X_U4.9) = 280.47mV \ 880.38uV

V(X_U4.11) = 1.818V \ 289.12mV

V(X_U4.20) = 4.822V \ 5.000V

V(X_U4.22) = 4.757V \ 4.796V

These supply currents failed to converge:

I(X_U4.E_EMIR) = -4.586mA \ -4.751mA

I(X_U4.E_EVAL) = 0A \ -10.34pA

I(X_U4.E_U6_E1CMP) = 3.333mA \ 1.550mA

I(X_U4.E_U7_E1CMP) = -1.667mA \ 116.72uA

I(V_V3) = -3.918mA \ -3.981mA

I(X_U4.V_U6_V2) = -3.333mA \ -1.550mA

I(X_U4.V_U7_V2) = 1.667mA \ -116.74uA

These devices failed to converge:

X_U4.D_U6_D1CLMP X_U4.D_U7_D1CLMP X_U4.M_U2_U1_M4 X_U4.M_U2_U1_M6

X_U4.M_U2_U1_M8 X_U4.M_U2_U1_M1 X_U4.M_U2_U1_M2 X_U4.M_U2_U1_M5

X_U4.M_U2_U2_M6 X_U4.M_U2_U2_M1 X_U4.M_U2_U2_M2 X_U4.M_U2_U2_M7

X_U4.M_U2_U3_M1 X_U4.M_U2_U3_M3 X_U4.M_U2_U4_M3 X_U4.M_U2_U4_M4

X_U4.M_U2_U5_M2 X_U4.M_U2_U5_M3 X_U4.M_U2_U5_M4 X_U4.M_U2_U6_M3

X_U4.M_U2_U7_M2 Q_Q3

ERROR(ORPSIM-15659): Discontinuing simulation due to convergence problem

**** Interrupt ****

Any help appreciated.

Regards,

Mark