an urgent problem of HSPICE:' error: no convergence in operating point'
时间：03-25
整理：3721RD
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I have tried a simulation in HSPICE with a circuit composed of a ring oscillator( 601 CMOS converters),but failed.
The library I used is 350nm craft level.
The netlist is as follows:
any help is my expectation.
The library I used is 350nm craft level.
The netlist is as follows:
Code:
.LIB 'D:\HSPICE_sim\SMIC35_SPICE\TD-MM35-SP-2002v5T\ASCII\ASCII\hspice\Enhanced_MS035_v0p6.lib' tt .GLOBAL VSS VDD .PARAM AEMI=0 .PARAM FEMI=1000MEG *** Power Supply *** VSUP VDD0 VSS 1.2 VEMI VDD VDD0 SIN(0 AEMI FEMI 10n) VGND VSS 0 0 .NODESET V(1)=0 *** Ring *** XCH1 2 1 Chain200INVX1 XCH2 3 2 Chain200INVX1 XCH3 4 3 Chain200INVX1 XNOTFE 1 4 INVX1 *** Chain of 200 Inverters Ring *** .subckt Chain200INVX1 11 1 XCHAIN1 2 1 Chain20INVX1 XCHAIN2 3 2 Chain20INVX1 XCHAIN3 4 3 Chain20INVX1 XCHAIN4 5 4 Chain20INVX1 XCHAIN5 6 5 Chain20INVX1 XCHAIN6 7 6 Chain20INVX1 XCHAIN7 8 7 Chain20INVX1 XCHAIN8 9 8 Chain20INVX1 XCHAIN9 10 9 Chain20INVX1 XCHAIN10 11 10 Chain20INVX1 .ends Chain20INVX1 *** Chain of 20 Inverters *** .subckt Chain20INVX1 21 1 XNOT1 2 1 INVX1 XNOT2 3 2 INVX1 XNOT3 4 3 INVX1 XNOT4 5 4 INVX1 XNOT5 6 5 INVX1 XNOT6 7 6 INVX1 XNOT7 8 7 INVX1 XNOT8 9 8 INVX1 XNOT9 10 9 INVX1 XNOT10 11 10 INVX1 XNOT11 12 11 INVX1 XNOT12 13 12 INVX1 XNOT13 14 13 INVX1 XNOT14 15 14 INVX1 XNOT15 16 15 INVX1 XNOT16 17 16 INVX1 XNOT17 18 17 INVX1 XNOT18 19 18 INVX1 XNOT19 20 19 INVX1 XNOT20 21 20 INVX1 .ends Chain20INVX1 *** Standard Cell Inverter X1 *** .subckt INVX1 Y A M0 VDD A Y VDD p33 l=0.13u w=0.64u M1 Y A VSS VSS n33 l=0.13u w=0.42u .ends INVX1 *** simulation setup *** .TRAN 0.05ns 400ns .OPTION INGOLD=1 .OPTION PROBE .PROBE v(1) .ALTER .PARAM AEMI=0.05 .ALTER .PARAM AEMI=0.10 .ALTER .PARAM AEMI=0.15 .ALTER .PARAM AEMI=0.20 .ALTER .PARAM AEMI=0.25 .ALTER .PARAM AEMI=0.30 .ALTER .PARAM AEMI=0.35 .ALTER .PARAM AEMI=0.40 .ALTER .PARAM AEMI=0.45 .ALTER .PARAM AEMI=0.50 .END
Hi,
I ve not read your netlist in detail, but try to fix one net in start condition, at zero for example.
It should solve your problem, which is common with spice simulator.
Regards,
RG
Syntax :
.INIT net voltage
hi!
I have exchanged " .NODESET V(1)=0" with ".IC V(1)=0", and finally succeeded. Thank you for your suggestion.