Miller - Miller Effect - MOSFET Define Gi = 1 1 , GD = , Ri...

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Miller Effect - MOSFET Define i i 1 G R = , = D D 1 G R , = g g 1 G R , = ds ds 1 g r in ig s i vv G =+ (1) v gs = v g () ( ) od s D m g g o g d vg G g v v vs C ++ = (2) ( ) = g d g g d m vg G s C vs C g (3) = gd m og ds D gd sC g gGs C (4) + in g g g gs g o gd i v G v sC v v sC (5) g gg g s go g d i 1 v Gv s C s C G ⎡⎤ + + ⎣⎦ (6) gd i g g g gs gd o ii sC 1 vvv 1 Gs C s C v GG + + + ⎢⎥ (7)
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- 2 - () gd io i g gg sg d i sC vv G v 1 1 G sC sC G + = ⎡⎤ ++ + ⎢⎥ ⎣⎦ (8) gd gd m i o g dDd s d i sC sC g G v sC G g 1 1 G sC sC G + =⋅ + (9) or gd i o i sC G D v U K 1 G + + (10) in which we have defined: =− g dm Ds C g =+ + g s Us C G g + g gs gd KGs Cs C . Next, we get ii o g d o i Gv v sC D v GK U + + (11) or og d oo vsC DD GKU GKU −⋅ = (12) which is gd o sC D D v1 −= (13)
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- 3 - The voltage gain is then given by () oi ii gd i vG D1 K U DsC 1 UG K =⋅ + ⎡⎤ ⎢⎥ + ⎣⎦ (14) in terms of the circuit parameters ( ) ( ) ( ) ig dm g d i g gs gd gd D ds gd gd m Gs C g D K U D s C G G sC sC sC G g sC sC g == +− ++ + (15) or ( ) ( ) im g d o i i g gs gd gd D ds gd m gd Gg s C v v G G sC sC sC G g sC g sC =− + + (16) Define ' D
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Miller - Miller Effect - MOSFET Define Gi = 1 1 , GD = , Ri...

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