Improved description of base dynamics in the modelling of bipolar transistors

Markku Sipilä, Veikko Porra, Martti Valtonen

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)


    An improved non‐linear high‐frequency model for the bipolar transistor is presented, based on considerations of the dynamics of the charge stored in the base region. the model incorporates higher‐order circuit elements in order to obtain increased accuracy in circuit simulation at high frequencies. the model is derived from device physics by solving the diffusion equation in the base region by means of a quasi‐static expansion. the result is a more accurate circuit representation, which can be added to existing bipolar transistor models. Simulation examples are given and the possible convergence problems associated with the model are discussed.
    Original languageEnglish
    Pages (from-to)465-482
    JournalInternational Journal of Circuit Theory and Applications
    Issue number4
    Publication statusPublished - 1989
    MoE publication typeA1 Journal article-refereed


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