h13_lecture9_2

h13_lecture9_2 - Lecture 9 Common Drain Stage(Source...

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EE 214 Lecture 9 (HO#13) B. Murmann 1 Lecture 9 Common Drain Stage (Source Follower) Boris Murmann Stanford University [email protected] Copyright © 2004 by Boris Murmann EE 214 Lecture 9 (HO#13) B. Murmann 2 Overview Reading 3.3.7 (Common Drain Stage) 7.2.2 (Frequency Response of Voltage Buffers) 5.3 (Source Follower as an Output Stage, optional) Introduction Last lecture, we have seen that a common gate stage has a fairly low input impedance, and high output impedance. The common drain stage that we'll analyze today exhibits the exact opposite features: High input impedance and low output impedance. After an analysis of relevant port characteristics, we will discuss some potential applications and also drawbacks of this circuit.
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