Ming c wu 9 example vout vin a rs cgd1cgs1 cgd1

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Unformatted text preview: t Analysis of CS Stage §༊  Direct analysis yields slightly different pole locaFons and an extra zero: ωz = gm C XY ω p1 = 1 (1 + g m RD )C XY RThev + RThevCin + RD (C XY + Cout ) ω p2 = (1 + g m RD )C XY RThev + RThevCin + RD (C XY + Cout ) RThev RD (CinC XY + Cout C XY + CinCout ) EE105, Fall 2013 Lecture 21 – Slide 15 Prof. Ming C. Wu I/O Impedances of CS Stage λ =0 Zin ≈ 1 jω "CGS + (1 + gm RD ) CGD $ # % EE105, Fall 2013 Z out = Lecture 21 – Slide 16 1 jω [CGD + CDB ] || RD Prof. Ming C. Wu 8 CG Stage: Pole Frequencies CG stage with MOSFET capacitances shown ω p, X = λ =0 1 ⎛ྎ 1 ⎞ྏ ⎜ྎ RS || ⎟ྏC X ⎜ྎ g m ⎟ྏ ⎝ྎ ⎠ྏ C X = CGS + C SB ω p ,Y = 1 RD CY CY = CGD + C DB Lecture 21 – Slide 17 EE105, Fall 2013 Prof. Ming C. Wu AC Analysis of Source Follower λ =0 vout vin CGS gm = 2 a( jω ) + b( jω ) + 1 EE105, Fall 2013 1 + ( jω ) §༊  The transfer funcFon of a source follower can be obtained by direct AC analysis, similarly as for the emi[er follower a= RS (CGD CGS + CGD C SB + CGS C SB ) gm b = RS CGD + Lectu...
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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 University of California, Berkeley.

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