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IEEE Electron Device Letters
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Collector Signal Delay in the Presence of Velocity Overshoot

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Abstract

The well-known expression equating the collector signal delay to one-half of the transit time through the base-collector depletion region is incorrect in the presence of a nonconstant carrier velocity, as occurs for velocity overshoot. The correct expression yields a smaller signal delay than the conventional estimate for typical situations, further emphasizing the benefit of velocity overshoot in bipolar devices. © 1990 IEEE

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IEEE Electron Device Letters

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