Abstract
An improved Early voltage model reflecting the effect of bias variation is developed. The bias dependencies of the Early voltage are more prominent as the base width of the bipolar transistor decreases. Thus, using the conventional constant Early voltage model can result in considerable errors in modeling the advanced bipolar transistors which possess very thin base region. Comparisons between the present model and the conventional model at different bias conditions support this assertion. SPICE simulations are performed to demonstrate the impact of this study on the small-signal performance of bipolar-transistor integrated circuits.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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