Lecture 8ANNOUNCEMENTS•A summary of frequently misunderstood/missed concepts isnow posted on the class website, and will be updated regularly.•Graded HW assignments can be picked up in lab (353 Cory).OUTLINEÆPlease indicate your lab section on your HW assignments!•BJT Amplifiers (cont’d)–Common‐emitter topology–CE stage with emitter degeneration–Impact of Early effect (ro)EE105 Fall 2007Lecture 8, Slide 1Prof. Liu, UC BerkeleyReading: Finish Chapter 5.3.1
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Emitter Degeneration•By inserting a resistor in series with the emitter, we“degenerate” the CE stage.•This topology will decrease the gain of the amplifier butimprove other aspects, such as linearity, and inputdimpedance.EE105 Fall 2007Lecture 8, Slide 2Prof. Liu, UC Berkeley