Lecture 12

This improves the gain of the ce or cb amplier however

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Unformatted text preview: sts the impedance seen looking into the collector. –  This improves the gain of the CE or CB amplifier. However, headroom is reduced. VE = I E RE Rout = !1 + gm ( RE || rπ )# rO + RE || rπ " $ EE105, Fall 2013 Lecture 12 – Slide 3 Prof. Ming C. Wu Cascode Stage §༊  In order to relax the trade- off between output impedance and voltage headroom, we can use a transistor instead of a degenera0on resistor: Rout = [1 + g m (rO 2 || rπ 1 )]rO1 + rO...
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This note was uploaded on 01/22/2014 for the course EE 105 taught by Professor King-liu during the Fall '07 term at Berkeley.

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