The common-emitter amplifier circuit is shown as below. The circuit parameters are ẞr = 80, gm = 57.14µA/V,r* = 1.4kÔ, C„ = 15pF,Cμ = 1pF, R$ = 200N, R₁ = 7kN, R₂ = 4.3k, RE = 3300, Rc = 5k, R₁ = 5k. R₁ Rc +Vcc = 15 V RS C₁ B R₂ ic C₂ iB E RL RE CE The low-frequency AC equivalent circuit is given as below. B 16 G R$ G₁ 8mVbe Vbe Rc R₁ RB E RE CE Assume that the low 3-dB frequency fr, is dominated by the lowest Thevenin's equivalent resistance values among C1, C2 and CE. If we want to set fL = 150Hz, then the bypass capacitor CE should have the capacitance value close to __µF. 19.1

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