Shooting Newton (shooting) and harmonic balance (HB) are complementary technologies and used for circuits that exhibit different behaviors.
The shooting Newton algorithm uses an adaptive time step control, which is particularly effective for sharp transitions. Convergence is robust and not as sensitive to model imperfections.
Harmonic balance is much faster for mildly nonlinear circuits. When the simulation parameters are set up properly, both should give accurate, very similar results (however, since the algorithms used are not identical, the results will not be identical).
Use harmonic balance for:
Use shooting Newton for:
Important Note -- if simulating oscillators, see:
http://sourcelink.cadence.com solution 11480630 - Guidelines for Simulating Oscillators in SpectreRF MMSIM 7.0.1