The Influence of the Reverse Early Effect on the Performance of Bandgap References
作者:A. van Staveren, C. J. M. Verhoeven, and A. H. M. van Roermund
摘要:In the literature three key-parameters are commonly used for the design of bipolar bandgap references: EG(bandgap energy), IS (saturation current) and XTI (exponent of the temperature behavior of IS). This paper shows that four key parameters exist: these three and VAR,the reverse Early voltage. This parameter models the influence of the base-width modulation at the base-emitter junction on the collector current. A general expression for the error in the output voltage caused by the reverse Early effect is derived and a comparison is made with other errors.
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