# su10q03 - f gure shows a MOSFET bias circuit. Given: V + =...

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ECE3050Ana logE lectron icsQu iz3 June 9, 2010 Professor Leach Last Name: First Name: Instructions. Print and sign your name in the spaces above. Place a box around answers when appropriate. Honor Code Statement: I have neither given nor received help on this quiz. Initials Equations: I D = K ( V GS V TO ) 2 , G m =( r s + R ts ) 1 , r s = g 1 m , r id = r 0 (1 + g m R ts )+ R ts , r is = r s , r ig = . 1o f2 . The f gure shows a MOSFET signal circuit that is called a phase splitter. It is given that R D = R S =2k , g m =0 . 002S ,and r 0 = (open circuit). (a) Draw the Norton drain circuit and use it to solve for v o 1 as a function of v i . (b) Draw the Thévenin source circuit and use it to solve for v o 2 as a function of v i . (c) What might be the reason that the circuit is called a “phase splitter?” v o 1 = G m v i R D = R D r s + R S v i = 0 . 8 v i v o 2 = R S r s + R S v i = 0 . 8 v

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Unformatted text preview: f gure shows a MOSFET bias circuit. Given: V + = 24V , R D = 11k , R G = 100k , R S = 1 . 2k , K = 10 S / V 2 , and V TO = 1 . 8V . (a) Solve for V GG and R GG . V GG = V + I D R D R GG = R G + R D (b) Write the loop equation for the gate-source loop and use it to solve for I D assuming the MOSFET is in its saturation state. V + I D R D = r I D K + V TO + I D R S = I D ( R D + R S ) + 1 K p I D + V TO V + = 0 = I D = 1mA (b) For the value of I D , check to verify that V DS > V GS V TO for the MOSFET to be in the saturation state. V DS = V + I D R D ( I D R S ) = 11 . 8V V GS V TO = r I D K = 10V 1 2...
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## This note was uploaded on 09/21/2010 for the course ECE 3050 taught by Professor Hollis during the Spring '08 term at Georgia Institute of Technology.

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su10q03 - f gure shows a MOSFET bias circuit. Given: V + =...

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