A common-emitter amplifier is designed to provide a particular midband gain and a particular bandwidth, using device A from Table P7.81. Assume \(I_{C Q}=1 \mathrm{~mA}\). Investigate the effect on midband gain and bandwidth if devices B and C are inserted into the circuit. Which device provides the largest bandwidth? What is the gain-bandwidth product in each case?

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Table P7.81 Device ABC Device specifications for Problem 7.81 fr (MHz) C (pF) 350 400 500 252 B Fb (2) 100 15 100 10 50 5