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Hybrid Pi And T Models Lecture
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Lecture 20 Bipolar Junction Transistors (BJT): Part 4 ...
alan.ece.gatech.eduLecture 20 Bipolar Junction Transistors (BJT): Part 4 Small Signal BJT Model ... •Small signal Models are only useful for Forward active mode and thus, are derived under this condition. (Saturation and cutoff are ... source version of Hybrid- pi Model .
EE105 – Fall 2014 Microelectronic Devices and Circuits
inst.eecs.berkeley.eduBJT Hybrid-Pi Mode • The hybrid-pi small-signal model is the intrinsic representation of the BJT. • Small-signal parameters are controlled by the Q-point and are independent of geometry of the BJT Transconductance: Input resistance: Output resistance: g m =I C V T ≅40I C r π =β oV T I C =β o g m orβ o =g m r π r o =V A +V CE I C ≅V ...