7.14 A BJT amplifier is biased to operate at a constant collector current IC = 0.5 mA irrespective of the value of β. If the manufacturer specifies β to range from 50 to 200, give the expected range of gm, IB, and rπ.
gm is constant at 20 mA/V; IB = 10 µA to 2.5 µA; rπ = 2.5 kΩ to 10 kΩ
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