Some comments and concepts.
The term "solid state" indicates that there are no vacuum tubes in the electronics. AFAIK not even old Russian saws had vacuum tubes in their ignitions.
Simple thyristor/FET ignitions come in two general categories. 2-legged and 3-legged. Both types have a voltage multiplier circuit to create a viable spark (some in unit and some in a separate module) and a primary coil that generates a pulse of electricity as it interacts with the magnetic fields of the flywheel magnets.
2-legged coils are able to vary ignition timing with RPM only by a very small amount, based on the small speed-related variations in the primary voltage.
3-legged coils are capable of wider timing variations because the 3rd leg, or pole, provides the circuitry with a varying interval analogous to the RPM.
Either type may also include a zener diode to kill spark below a certain RPM and/or a diode to prevent the engine firing in reverse.
Autotune/M-Tronic are a different thing altogether because the computer "reads" and "knows" the position of the flywheel thousands of times a second.