3. Consider the amplifier circuit shown in Fig. 3. The BJT has = 0.7 V, β = 200, Cμ = 0.8 pF, and fr= 600 MHz. The MOSFET has Vt= 1 V, k'WIL =2 mA/V2, and =1 pF.
申論題內容
(c) Consider the circuit at higher frequencies. Please use open-circuit time constants to estimate fH (8%).
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= 0.7 V, β = 200, Cμ = 0.8 pF, and fr= 600 MHz. The MOSFET has Vt= 1 V, k'WIL =2 mA/V2, and 
=1 pF.