The common-emitter amplifier circuit is shown as below. The circuit parameters are ẞr = 80,9m = 57.14μA/V,r = 1.4kS, C = 15pF, Cμ = 1pF, Rs = 2000, R₁ = 7k, R₂ = 4.3kN, RE = 330, Rc = 5k, R₁ = 5kn. +Vcc = 15 V R$ C₁ R₁ Rc i。 ic C₂ B Q₁ iB E RL Vo RE CE R₂ The low-frequency AC equivalent circuit is given as below. B M R$ 14 C₂ C₁ 8mVbe Vbe Rc RL RB RE CE The Thevenin's equivalent resistance connecting to the capacitor CE is close to ________. Answer

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