10.27 A common-emitter amplifier is measured at midband and found to have a gain of −50 V/V between base and collector. If Cπ = 10 pF, Cμ = 1 pF, and the effective source resistance = 5 kΩ [refer to Fig. 10.13(c)], find Cin and the 3-dB frequency fH. 61 pF; 522 kHz

10.27 A common-emitter amplifier is measured at midband and found to have a gain of −50 V/V between base and collector. If Cπ = 10 pF, Cμ = 1 pF, and the effective source resistance = 5 kΩ [refer to Fig. 10.13(c)], find Cin and the 3-dB frequency fH. 61 pF; 522 kHz

10.27 A common-emitter amplifier is measured at midband and found to have a gain of −50 V/V between base and collector. If Cπ = 10 pF, Cμ = 1 pF, and the effective source resistance = 5 kΩ [refer to Fig. 10.13(c)], find Cin and the 3-dB frequency fH.

61 pF; 522 kHz

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