Comments on 'Early voltage in very-narrow-base bipolar transistors' by D.J. Roulston

An improved Early voltage V/sub A/ model for an n/sup +//p/n bipolar transistor derived by D.J. Roulston (see ibid., vol.11, no.2, p.88-9, 1990) is shown to be less accurate, and a new voltage model is derived.<
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