Lecture 20

First stage source follower 1 0 ee105 fall 2013 second

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Unformatted text preview: Wu 4 CS Stage vs. CG Stage §༊  With the input signal applied at different locaIons, these circuits behave differently, although they are idenIcal in other aspects. Common gate amplifier Common source amplifier λ1 ≠ 0 λ2 = 0 Av = − g m1{[(1 + g m2 rO 2 ) RS + rO 2 ]|| rO1} Lecture 20 – Slide 9 EE105, Fall 2013 Av = rO1 1 + RS gm2 Prof. Ming C. Wu Composite Stage Example 1 §༊  By replacing M1 and the current source with a Thevenin equivalent circuit, and recognizing the right side as a CG stage, the voltage gain can be easily obtained. First stage: Source Follower λ1 = 0 EE105, Fall 2013 Seco...
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