H.W:A common-emitter amplifier has CCi= CE = CC2= 1µF, RB= 100k2, Rsig = 5k2, gm = 40 mA/V,m rz 2.5kN, RE = 5k2, Rc= 8kN, and RL = 5k2. Find the value of the time constant associated with each capacitor, and hence estimate the value of fi. Also, compute the frequency of the transmission zero introduced by CE and comment on its effect on f.. Ans. Tci = 7.44 ms; tCE = 0.071 ms; tc2 = 13 ms; fi = 2.28 kHz; fz= 31.8 Hz, which is much smaller than fi and thus has a negligible effect on fL. %3D %3D %3D

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H.W: A common-emitter amplifier has CCi= CE = Cc2 = 1µF, RB= 100k2, Rsig
= 5kN, gm = 40 mA/V,m ra = 2.5k2, RE = 5k2, Rc= 8k2, and RL = 5k2. Find
the value of the time constant associated with each capacitor, and hence
estimate the value of fi. Also, compute the frequency of the transmission zero
introduced by CE and comment on its effect on fi. Ans. TCI = 7.44 ms; tCE
= 0.071 ms; tc2 = 13 ms; fi = 2.28 kHz; fz= 31.8 Hz, which is much
smaller than fi and thus has a negligible effect on f.
Transcribed Image Text:H.W: A common-emitter amplifier has CCi= CE = Cc2 = 1µF, RB= 100k2, Rsig = 5kN, gm = 40 mA/V,m ra = 2.5k2, RE = 5k2, Rc= 8k2, and RL = 5k2. Find the value of the time constant associated with each capacitor, and hence estimate the value of fi. Also, compute the frequency of the transmission zero introduced by CE and comment on its effect on fi. Ans. TCI = 7.44 ms; tCE = 0.071 ms; tc2 = 13 ms; fi = 2.28 kHz; fz= 31.8 Hz, which is much smaller than fi and thus has a negligible effect on f.
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