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Problems with LTSpice's convergence

Category: Software

Hi! I have a circuit with a dual high speed voltage feedback amplifier (LM6172) and another amplifier (LM6171) connected to a supply comparator (LT1719) whose output is connected to the logic gate SN74AHC1G32.

When I try to run the simulation without the comparator the ltspice works. But when the comparator is connected between the amplifiers and the logic gate, the simultation doesn't converge... Does anyone know why is this happening?