Question

3. The values of the circuit elements in Figure 3 are as follows: Vpp = (5000+a) mV, Rs1 = (5000+B), Roi = (20000+y), RG1 = (15000+8), Ro2 = (35000+E), C = 10 uF. Vint = 100 sin (20000mt) mV. The MOSFET parameters of M1 are: Vtp = -(500+) mV, Hp Cox = 100 VIA?, (W/L), = 8 um/1 um, Apl = 0.01 V. Calculate the DC component of Vouti (5 points) and small-signal component of Vouti (5 points) (ii) Use LTSpice to plot Vouts as a function time. (5 points). If the result of (ii) is different from (i), explain why. (5 points) (1) (iii) Place a 10 uF bypass capacitor in parallel with Rs and repeat parts (1)-(ii) for the modified circuit. (5 points) } Ror} Rs1} HM Vor Vine RG2 s Rois Vout Figure 3

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Answer 1

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• - gm vgs + (vo-vs) from reel @ out out noda to - gm (kin-ToRsi) + (-I Roi-ToRs 1) 0 To Crot ROIAR) - gmro [win-ToRsi) a to Croof Rs14 Roit gm ro Rs1) =gmro vin gmro vin Votrs Trolt gmrors) Vo = - I ROI - & Rol - ro = -gm rouin. rot RSIAROIT gmrors, ID = M.Cox Cvg -(vto 1] Clt droo) gon = 25o = 2 (vg - rto Clears) re colex ze args W XJ06x x2 (4.480 -0.5) (14 2 vnt) 3.27 x 103 No – 269 71 din caut nr. 25.72 sro - 10.48 sin (20000 ft) nr.