Question

QUESTION (5) The following series-shunt feedback amplifier is already biased properly. +VDD I Rp2Z Rois Tove M a) Identify the feedback network (B circuit) and provide an expression for B. Also give an expression for the ideal or upper-bound value of the closed-loop gain Af. You can neglect the output resistance ro for Mi and M2. (6 points) b) Determine the ratio Rz/Ri that will provide an ideal closed-loop gain of 10 V/V. If R1 = 1 k12, what should be the value for R2? (4 points) c) Provide an expression for the open-loop gain AB (6 points) d) For gml = gm2 = 4 mA/V, and Roi = Rp2 = 10 k12, determine the values of AB, A, and As. (4 points)

Answer 1

(0) Feed back netuwose RI No RI P eed back netwosk= Vf RitRe Rit R2 Aß >>I closed loop gaio Af= It Af ( By ngleahing Yo Dfmiem2) Ref Rz Ry upper bound | Ideal value= = RI Ritk2 Af R2 if Ri- In R2 Ideal closed lwp gain 10 Rz = 9 ka R1 ReE RI is pant of feed back o netwo gk Comman Source amplifer Ap- ( m. Ro, Roz ) (1+)

(a) Ime Gmz Roi Roz RI RITR2 Ritke) 4x4x1ó6 xlonloxlo * lont qkn 1600 x! 1o - 160 Imi Jmz Rol Ro2 4X4 106 kloxloxlo 1600 1600 1600 Af - १.१3११ %3D 14 166 161 It Aß"