Dear all,

I'm observing really strong results when using Spectre dc analysis (operating point) on some small set of circuits. The problem resides in an LDO in power down, where there seems to flow some current both Kirchoff does not hold on a certain node.

Are there any special accuracy settings I should be looking at to improve the DC operating point calculation?

Regards

Peter

Peter,

  Could you provide any additional information about the simulation
issue with the LDO? If Kirchoff's current law is not satisfied at a node,
does the simulaiton converge? Is there anything special about the
power down state? For example, does the circuit have hystersis in the
control loop? Are you performing a dc operating point calculation
or a dc sweep? If the simulation is just a dc operating point, you can try
using the simulator option gmethod=both. If you are running from inside
the environment, you can tirn off all the homotopy and manually set
homotopy=arclength.

                                                                Best Regards,

                                                                   Sheldon