Paper Abstract and Keywords |
Presentation |
2010-01-14 10:25
Deviation from Proportional Relationship Between Emitter Charging Time and Inverse Current of Heterojunction Bipolar Transistors Operating at High Current Density Masayuki Yamada, Takafumi Uesawa, Yasuyuki Miyamoto, Kazuhito Furuya (Tokyo Inst. of Tech.) ED2009-182 MW2009-165 Link to ES Tech. Rep. Archives: ED2009-182 MW2009-165 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We investigated the relationship between the emitter charging time and inverse current of heterojunction bipolar transistors (HBTs) operating at high current density. This relationship appears to be proportional when the current density is low enough, but it deviates from this proportional relationship at a current density of more than a few mega-ampere per square centimeter. This deviation causes an error in the separation of the total delay time into components when assuming the relationship 1/fT = A/I+B, where fT is the cutoff frequency, I is the current, and A and B are constants. This error is more than 30 fs, which is not negligible for ultra-high-speed HBTs. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Heterojunction Bipolar Transistor (HBT) / Emitter Charging Time / Dynamic Emitter Resistance / Emitter Junction Capacitance / Fermi-Dirac Distribution / High Current Density Operation / / |
Reference Info. |
IEICE Tech. Rep., vol. 109, no. 360, ED2009-182, pp. 43-48, Jan. 2010. |
Paper # |
ED2009-182 |
Date of Issue |
2010-01-06 (ED, MW) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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ED2009-182 MW2009-165 Link to ES Tech. Rep. Archives: ED2009-182 MW2009-165 |
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