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  1. #1
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    ERROR -- Convergence problem in transient bias point calculation

    hello, I have implemented the circuit shown in the image attached with this post. When i run the circuit it gives me and error i.e.
    "ERROR -- Convergence problem in transient bias point calculation".
    The simulation window shows these messages:
    Code:
    **** 04/18/15 12:56:13 ****** PSpice Lite (October 2012) ****** ID# 10813 ****
    
     ** Profile: "SCHEMATIC1-volam"  [ C:\Users\AliRaza\Desktop\Gates\VA\vola-pspicefiles\schematic1\volam.sim ] 
    
    
     ****     CIRCUIT DESCRIPTION
    
    
    ******************************************************************************
    
    
    
    
    ** Creating circuit file "volam.cir" 
    ** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS
    
    *Libraries: 
    * Profile Libraries :
    * Local Libraries :
    * From [PSPICE NETLIST] section of C:\Users\AliRaza\AppData\Roaming\SPB_16.6\cdssetup\OrCAD_PSpice/16.6.0/PSpice.ini file:
    .lib "nomd.lib" 
    
    *Analysis directives: 
    .TRAN  0 100m 0 1u 
    .OPTIONS ADVCONV
    .PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*)) 
    .INC "..\SCHEMATIC1.net" 
    
    
    
    **** INCLUDING SCHEMATIC1.net ****
    * source VOLA
    Q_Q1         N00123 N00210 N00134 QbreakN 
    Q_Q2         N00210 N00130 0 QbreakN 
    Q_Q3         N00123 N00134 N00130 QbreakN 
    R_R1         0 N00134  50k TC=0,0 
    R_R2         0 N00130  50 TC=0,0 
    V_V1         N00210 0 5Vdc
    V_V2         N00123 0 5Vdc
    R_R4         N01292 N01250  200k TC=0,0 
    R_R3         N01203 N01250  200k TC=0,0 
    V_V4         N01250 0 10Vdc
    R_R5         N01299 0  1G TC=0,0 
    Q_Q4         N01292 N01203 N01299 QbreakN 
    
    **** RESUMING volam.cir ****
    .END
    
    **** 04/18/15 12:56:13 ****** PSpice Lite (October 2012) ****** ID# 10813 ****
    
     ** Profile: "SCHEMATIC1-volam"  [ C:\Users\AliRaza\Desktop\Gates\VA\vola-pspicefiles\schematic1\volam.sim ] 
    
    
     ****     BJT MODEL PARAMETERS
    
    
    ******************************************************************************
    
    
    
    
                   QbreakN         
                   NPN             
           LEVEL    1            
              IS  100.000000E-18 
              BF  100            
              NF    1            
              BR    1            
              NR    1            
             ISS    0            
              RE    0            
              RC    0            
             CJE    0            
             VJE     .75         
             CJC    0            
             VJC     .75         
             MJC     .33         
            XCJC    1            
             CJS    0            
             VJS     .75         
              KF    0            
              AF    1            
              CN    2.42         
               D     .87         
    
    
    ERROR -- Convergence problem in transient bias point calculation
    
    
      Last node voltages tried were:
    
     NODE   VOLTAGE     NODE   VOLTAGE     NODE   VOLTAGE     NODE   VOLTAGE
    
    
    (N00123)    4.2872 (N00130)    1.5484 (N00134)    2.9775 (N00210)    4.2872     
    
    (N01203)    8.5743 (N01250)    8.5743 (N01292)    8.5727 (N01299)    8.1035 
    
    
      These supply currents failed to converge:
    
        I(V_V1)                   =   -10.00GA  \   -10.00GA
    
    **** Interrupt ****

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  2. #2
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    Re: ERROR -- Convergence problem in transient bias point calculation

    Are you joking? Obviously the schematic circuit doesn't belong to the netlist which has e.g. 4 transistors and three voltage sources.


    1 members found this post helpful.

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