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I've been trying to get an SSHI circuit running on LTspice for several days now (see below schematic). My problem is the following: the simulation (.tran) stops after a hundred milliseconds. Being a beginner, I don't know what to do about this problem.

Thank you in advance for your help.

SSHI circuit

voltage on the source and on C3

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  • \$\begingroup\$ You're having convergence issues, presumably. \$\endgroup\$ – Hearth Dec 30 '20 at 16:27
  • \$\begingroup\$ @Hearth What are convergence issues ? \$\endgroup\$ – Julien Dec 30 '20 at 16:33
  • \$\begingroup\$ The solver is having trouble converging on a solution. It's a simulation problem, not a problem with the circuit. I'm not awake enough to help figure out how to fix it though. Incidentally, just out of curiosity, why do you have all your wires going past the terminals of your devices? \$\endgroup\$ – Hearth Dec 30 '20 at 16:35
  • \$\begingroup\$ @Hearth I didn't pay attention to it but I think it doesn't affect the circuit (as I said, i'm still very new to this) \$\endgroup\$ – Julien Dec 30 '20 at 16:39
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    \$\begingroup\$ A couple quick comments. You're missing the Rp for the current source. Your PNPs are specified as 2N3906, but you left the NPNs as default. I would select 2N3904 for them so you don't leave them as default. Doesn't hurt to select 1N4148 for the diodes too so the solver doesn't have to deal with zero series resistance and zero junction capacitance. Maybe also right-click L1 and add more equivalent series resistance. \$\endgroup\$ – Ste Kulov Dec 30 '20 at 18:32

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