Announcements Homework 12 the last one due next Tuesday EE105 Fall 2005 Lab 9 the last one this week Microelectronic Devices and Circuits Reading Chapter 7 7 4 5 Lecture 27 Bipolar Junction Transistor Small Signal Models 2 BJT Capacitances Lecture Material Last lecture Base charging capacitance Cb due to minority carrier charge storage mostly electrons in the base Bipolar junction transistor Collector current C b g m F This lecture Bipolar junction transistor Small signal models Base emitter depletion capacitance CjE 1 4 CjEo Total B E capacitance C CjE Cb 3 Complete Small Signal Model 18 Bipolar Amplifiers Common emitter amplifier 19 Biasing adjust VBIAS VBE so that IC ISUP Note this could be tricky 20 1 Small Signal Two Port Model Parameters Rin Rout Gm 21 2
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