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#48 Transient analysis is failing for a BJT AMP

0.0.17
closed
nobody
None
5
2013-06-20
2008-10-10
pourkk
No

Hi I have an Amp which I simulate with BJT's. I am attaching the schematic also. The transient analysis is failling due to the so called
"ERROR: TR1: Jacobian singular at t = 0.000e+000, aborting transient analysis". Can you help me find what is causing this behaviour? Is it a bug?

The tracing is the following:
-----------------------------------------------------
Starting new simulation on Παρ 10. Οκτ 2008 at 15:44:56

creating netlist... done.
parsing netlist...
checking netlist...
checker notice, variable `Input.v' in equation `db' not yet defined
checker notice, variable `Output.v' in equation `db' not yet defined
checker notice, variable `Pr2.i' in equation `Pwr' not yet defined
checker notice, variable `Output.v' in equation `Pwr' not yet defined
netlist content
28 R instances
17 C instances
2 Vdc instances
1 Vac instances
1 IProbe instances
6 Diode instances
12 BJT instances
1 DC instances
1 AC instances
1 TR instances
creating netlist...
checker notice, variable `Input.v' in equation `db' not yet defined
checker notice, variable `Output.v' in equation `db' not yet defined
checker notice, variable `Pr2.i' in eqchecker notice, variable `Input.v' in equation `db' not yet defined
checker notice, variable `Output.v' in equation `db' not yet defined
checker notice, variable `Pr2.i' in equation `Pwr' not yet defined
checker notice, variable `Output.v' in equation `Pwr' not yet defined
uation `Pwr' not yet defined
checker notice, variable `Output.v' in equation `Pwr' not yet defined

WARNING: Increased breakdown current to 0.00146217 to match the saturation current 6.3e-008
WARNING: Increased breakdown current to 0.00146217 to match the saturation current 6.3e-008
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T15'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `BC550C1'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `BC550C'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T24'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T24'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T25'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T25'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T26'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T26'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T20'
WARNING: DC1: DC analysis failed, using fallback #1 (source stepping)
WARNING: Increased breakdown current to 0.00146217 to match the saturation current 6.3e-008
WARNING: Increased breakdown current to 0.00146217 to match the saturation current 6.3e-008
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T15'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `BC550C1'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `BC550C'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T24'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T24'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T25'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T25'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T26'
WARNING: Unphysical model parameter Nr = 0.894461 in BJT `T26'
WARNING: Unphysical model parameter Nf = 0.85 in BJT `T20'
WARNING: TR1: inserted virtual resistance at node `_emitter#T21' connected to [_Re#T21,T21]
WARNING: TR1: inserted virtual resistance at node `_base#T21' connected to [_Rbb#T21,T21]
WARNING: TR1: inserted virtual resistance at node `_base#T17' connected to [_Rbb#T17,T17]
WARNING: TR1: inserted virtual resistance at node `_emitter#T17' connected to [_Re#T17,T17]
WARNING: TR1: inserted virtual resistance at node `Input' connected to [V3,C24,C23]
WARNING: TR1: inserted virtual resistance at node `_net0' connected to [Pr2,R23]
WARNING: TR1: inserted virtual resistance at node `_net20' connected to [_Cbcx#T26,_Rbb#T26,_Rc#BC550C,BC550C,R48,R5]
WARNING: TR1: inserted virtual resistance at node `_collector#T26' connected to [_Cbcx#T26,_Rc#T26,T26]
WARNING: TR1: inserted virtual resistance at node `_net12' connected to [_Cbcx#T25,_Cbcx#T24,_Rs#D_1N4004_5,_Rbb#T25,_Rbb#T24,_Re#BD139_1,R47,C16,R27,C12,C13]
WARNING: TR1: inserted virtual resistance at node `_collector#T25' connected to [_Cbcx#T25,_Rc#T25,T25]
WARNING: TR1: inserted virtual resistance at node `_collector#T24' connected to [_Cbcx#T24,_Rc#T24,T24]
WARNING: TR1: inserted virtual resistance at node `_net28' connected to [_Cbcx#BD139_1,_Rbb#BD139_1,R24Pot1,R47]
WARNING: TR1: inserted virtual resistance at node `_collector#BD139_1' connected to [_Cbcx#BD139_1,_Rc#BD139_1,BD139_1]
WARNING: TR1: inserted virtual resistance at node `_net6' connected to [_Rbb#T22,_Rbb#T29,_Rc#BD139_1,BD139_1,R46,C8,C9]
WARNING: TR1: inserted virtual resistance at node `_base#T22' connected to [_Rbb#T22,T22]
WARNING: TR1: inserted virtual resistance at node `_net3' connected to [_Rc#T22,_Rbb#T20,C6,T22,C9,R36]
WARNING: TR1: inserted virtual resistance at node `_collector#T22' connected to [_Rc#T22,T22]
WARNING: TR1: inserted virtual resistance at node `_net5' connected to [_Re#T22,_Rc#T20,T20,R14]
WARNING: TR1: inserted virtual resistance at node `_emitter#T22' connected to [_Re#T22,T22]
WARNING: TR1: inserted virtual resistance at node `_net16' connected to [_Rs#D_1N4004_2,D_1N4004_3]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N4004_2' connected to [_Rs#D_1N4004_2,D_1N4004_2]
WARNING: TR1: inserted virtual resistance at node `_net17' connected to [_Rs#D_1N4004_3,D_1N4004_4]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N4004_3' connected to [_Rs#D_1N4004_3,D_1N4004_3]
WARNING: TR1: inserted virtual resistance at node `_net18' connected to [_Rs#D_1N4004_4,D_1N4004_5]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N4004_4' connected to [_Rs#D_1N4004_4,D_1N4004_4]
WARNING: TR1: inserted virtual resistance at node `_net11' connected to [_Rbb#T21,_Rc#T25,T25,C12,C10,R37]
WARNING: TR1: inserted virtual resistance at node `_base#T21' connected to [_Rbb#T21,T21]
WARNING: TR1: inserted virtual resistance at node `_net8' connected to [_Rc#T21,_Re#T25,T21,R15]
WARNING: TR1: inserted virtual resistance at node `_collector#T21' connected to [_Rc#T21,T21]
WARNING: TR1: inserted virtual resistance at node `_net2' connected to [_Re#T21,_Re#T17,_Rs#D_1N5406_2,R50,R26,C11,C10,R37,R38,V2]
WARNING: TR1: inserted virtual resistance at node `_emitter#T21' connected to [_Re#T21,T21]
WARNING: TR1: inserted virtual resistance at node `_net10' connected to [_Rbb#T17,_Rc#T24,T24,C13,C11,R38]
WARNING: TR1: inserted virtual resistance at node `_base#T17' connected to [_Rbb#T17,T17]
WARNING: TR1: inserted virtual resistance at node `_net9' connected to [_Rc#T17,_Re#T24,T17,R17]
WARNING: TR1: inserted virtual resistance at node `_collector#T17' connected to [_Rc#T17,T17]
WARNING: TR1: inserted virtual resistance at node `_emitter#T17' connected to [_Re#T17,T17]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N4004_5' connected to [_Rs#D_1N4004_5,D_1N4004_5]
WARNING: TR1: inserted virtual resistance at node `_base#T20' connected to [_Rbb#T20,T20]
WARNING: TR1: inserted virtual resistance at node `_collector#T20' connected to [_Rc#T20,T20]
WARNING: TR1: inserted virtual resistance at node `_net1' connected to [_Re#T20,_Rc#BC550C1,_Re#T15,D_1N5406_1,BC550C1,R34,R5,R45,C6,C7,R36,V1]
WARNING: TR1: inserted virtual resistance at node `_emitter#T20' connected to [_Re#T20,T20]
WARNING: TR1: inserted virtual resistance at node `_base#T29' connected to [_Rbb#T29,T29]
WARNING: TR1: inserted virtual resistance at node `_net7' connected to [_Rc#T29,_Rbb#T15,T29,R34,C7,C8]
WARNING: TR1: inserted virtual resistance at node `_collector#T29' connected to [_Rc#T29,T29]
WARNING: TR1: inserted virtual resistance at node `_net4' connected to [_Re#T29,_Rc#T15,T15,R16]
WARNING: TR1: inserted virtual resistance at node `_emitter#T29' connected to [_Re#T29,T29]
WARNING: TR1: inserted virtual resistance at node `_base#T26' connected to [_Rbb#T26,T26]
WARNING: TR1: inserted virtual resistance at node `_net15' connected to [_Rc#T26,R24Pot1,T26,C16,C17,R46,D_1N4004_2]
WARNING: TR1: inserted virtual resistance at node `_net14' connected to [_Re#T26,R45]
WARNING: TR1: inserted virtual resistance at node `_emitter#T26' connected to [_Re#T26,T26]
WARNING: TR1: inserted virtual resistance at node `_base#T25' connected to [_Rbb#T25,T25]
WARNING: TR1: inserted virtual resistance at node `_emitter#T25' connected to [_Re#T25,T25]
WARNING: TR1: inserted virtual resistance at node `_base#T24' connected to [_Rbb#T24,T24]
WARNING: TR1: inserted virtual resistance at node `_emitter#T24' connected to [_Re#T24,T24]
WARNING: TR1: inserted virtual resistance at node `_net25' connected to [_Rbb#BC550C,C24,C23,R29]
WARNING: TR1: inserted virtual resistance at node `_base#BC550C' connected to [_Rbb#BC550C,BC550C]
WARNING: TR1: inserted virtual resistance at node `_collector#BC550C' connected to [_Rc#BC550C,BC550C]
WARNING: TR1: inserted virtual resistance at node `_net27' connected to [_Re#BC550C,_Re#BC550C1,R52]
WARNING: TR1: inserted virtual resistance at node `_emitter#BC550C' connected to [_Re#BC550C,BC550C]
WARNING: TR1: inserted virtual resistance at node `_net22' connected to [_Rbb#BC550C1,C22,C18,R49]
WARNING: TR1: inserted virtual resistance at node `_base#BC550C1' connected to [_Rbb#BC550C1,BC550C1]
WARNING: TR1: inserted virtual resistance at node `_collector#BC550C1' connected to [_Rc#BC550C1,BC550C1]
WARNING: TR1: inserted virtual resistance at node `_emitter#BC550C1' connected to [_Re#BC550C1,BC550C1]
WARNING: TR1: inserted virtual resistance at node `_base#BD139_1' connected to [_Rbb#BD139_1,BD139_1]
WARNING: TR1: inserted virtual resistance at node `_emitter#BD139_1' connected to [_Re#BD139_1,BD139_1]
WARNING: TR1: inserted virtual resistance at node `_base#T15' connected to [_Rbb#T15,T15]
WARNING: TR1: inserted virtual resistance at node `_collector#T15' connected to [_Rc#T15,T15]
WARNING: TR1: inserted virtual resistance at node `_emitter#T15' connected to [_Re#T15,T15]
WARNING: TR1: inserted virtual resistance at node `_net13' connected to [C21,R26,R27]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N5406_1' connected to [_Rs#D_1N5406_1,D_1N5406_1]
WARNING: TR1: inserted virtual resistance at node `_anode#D_1N5406_2' connected to [_Rs#D_1N5406_2,D_1N5406_2]
ERROR: TR1: Jacobian singular at t = 0.000e+000, aborting transient analysis
WARNING: AC1: inserted virtual resistance at node `quisient' connected to [_Rs#D_1N5406_1,D_1N5406_2,C18,C21,R49,R43,R42,R40,R39,R41,R17,R15,R14,R16]

Discussion

  • pourkk
    pourkk
    2008-10-10

    amp qucs schematic

     
    Attachments
  • Frans
    Frans
    2013-06-06

    • status: open --> closed
    • Group: --> v1.0_(example)