PREDICTION OF IMPACT-IONIZATION-INDUCED SNAP-BACK IN ADVANCED SI N-P-N BJTS BY MEANS OF A NONLOCAL ANALYTICAL MODEL FOR THE AVALANCHE MULTIPLICATION FACTOR
G. Verzellesi et al., PREDICTION OF IMPACT-IONIZATION-INDUCED SNAP-BACK IN ADVANCED SI N-P-N BJTS BY MEANS OF A NONLOCAL ANALYTICAL MODEL FOR THE AVALANCHE MULTIPLICATION FACTOR, I.E.E.E. transactions on electron devices, 40(12), 1993, pp. 2296-2300
Assuming a triangular shape for the electric field in the base-collect
or space-charge region of an n-p-n Si BJT enables the electron mean en
ergy to be calculated analytically from a simplified energy-balance eq
uation. On this basis a nonlocal impact-ionization model, suitable for
computer-aided circuit simulation, has been obtained and used to calc
ulate the output characteristics at constant emitter-base voltage (gro
unded base) of advanced devices. Provided the experimental bias-depend
ent value of the base parasitic resistance is accounted for in the dev
ice model, the base-collector voltage at which impact-ionization-induc
ed snap-back occurs can be accurately predicted.