lec22_mosv2

lec22_mosv2 - Small Signal Models of the MOSFET Transistor...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
± ² ³ Small Signal Models of the MOSFET Transistor 6.301 — Spring 2002 Massachusetts Institute of Technology Michael Perrott (Courtesy of Michael Perrott. Used with permission.) General Thevenin Resistance View R S R G R D R th d R th s R th g R D R S R th d R th s R th g R G -g mb v s v gs v s r o g m v gs g m = µ n C ox (W/L)(V GS - V T )(1 + λ V DS ) = 2 µ n C ox (W/L)I D (assuming λ V DS << 1) I D γ g m where γ = 2q ε s N A = g mb 2 2| Φ p | + V SB C ox In practice: g mb = g m /5 to g m /3 1 = r o λ I D Thevenin resistance at drain: R th d = r o (1 + ( g m + g mb ) R s )+ R s r o (1 + ( g m + g mb ) R s ) Thevenin resistance at gate: R th g = Thevenin resistance at source: R D 1 1 1 R th s = 1+ r o || for
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/20/2009 for the course CSAIL 6.012 taught by Professor Prof.cliftonfonstadjr. during the Fall '03 term at MIT.

Page1 / 2

lec22_mosv2 - Small Signal Models of the MOSFET Transistor...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online