Campos-Salazar, J.M., Aguayo-Lazcano, J.L., Rafiezadeh, R. and García-Rojas, G. 2025. Bipolar junction transistor amplifiers-state-space modeling across frequencies. Journal of Electronics and Electrical Engineering. 4, 2 (Jul. 2025), 25–52. DOI:https://doi.org/10.37256/jeee.4220256767.