Spirito effect

Some articles about Spirito effect 

http://s-audio.systems/data/uploads/articles/electro-thermal_instability_in_low_power_mos.pdf

http://s-audio.systems/data/uploads/articles/avalanche-induced_thermal_instability_in_ldmos.pdf

http://s-audio.systems/data/uploads/articles/modeling_the_onset_of_thermal_instability.pdf

http://s-audio.systems/data/uploads/articles/thermal_instabilities_in_high_current_power_mos_devices.pdf

http://s-audio.systems/data/uploads/articles/1330614332_renesas_feature_layout_1.pdf

"Directly or indirectly, all questions connected with this subject must come for decision to the ear, as the organ of hearing; and from it there can be no appeal" J.W.S. Rayleigh