Vis Ros Voc Rc Ran Cc ww Rg2 RE CE Rin Figure 10.7.1 R₁ V [40 minutes] 10.8 [35 points] For the amplifier circuit in Fig. 10.8.1 (refer to Figure below), assume that the BJT has VBE = 0.7 V and ẞ=100 and neglect the Early effect. [6 points] (a) Find the de bias current Ic and the de collector voltage Vc. [6 points] (b) Give the small-signal equivalent circuit to- gether with values of all its components, utilizing the T model for the BJT. [3 points] (c) Find the input resistance Rin- [2 points] (d) Find output resistance Rout- [6 points] (e) Find the overall midband gain Vo/Vsig. [12 points] (f) Use the method of short-circuit time constants to obtain an estimate of the 3-dB frequency ft. 10.9 [30 minutes] The MOSFET in the common-source amplifier in [30 points] Fig. 10.9.1 (refer to Figure on following page) is operating at g=5mA/V and has Cg = 1 pF and Cd=0.2pF. Channel-length modulation is negligibly small. (a) Find the midband voltge gain in dB. (b) Find the upper 3-dB frequency, H [5 points] [7 points] (c) Find the value of Co that places the pole it [4 points] introduces at 1 Hz. (d) Find the value of Cg that places the pole it [4 points] introduces at 100 Hz. (e) Find the value of CD that places the pole it [4 points] introduces at 10 Hz. (f) Sketch and carefully label the Bode plot for [6 points] the gain magnitude. Specify the lower 3-dB fre- quency,fl +15 V 5.1 k Rgt 150 kn Rc 1 µF R=1kf ww 330 F HH Ca ཤ Ca Ran R₁ 15 k R₁ 510 Veig R2 - 51 ԷԴ Re 1.5 kn Figure 10.8.1 CE HI 33 F %

Solved: Vis Ros Voc Rc Ran Cc ww Rg2 RE CE Rin Figure 10.7.1 R₁ V [40 minutes]

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Vis Ros Voc Rc Ran Cc ww Rg2 RE CE Rin Figure 10.7.1 R₁ V [40 minutes] 10.8 [35 points] For the amplifier circuit in Fig. 10.8.1 (refer to Figure below), assume that the BJT has VBE = 0.7 V and ẞ=100 and neglect the Early effect. [6 points] (a) Find the de bias current Ic and the de collector voltage Vc. [6 points] (b)