This document describes a common-emitter amplifier circuit with specified resistor values and operating conditions. The DC emitter current is 0.3 mA, with β0 = 120, rb = 300 kΩ, and re = 50 Ω. Given these parameters, the input resistance Rin and midband gain AM can be calculated. Additionally, if the transistor has fT = 700 MHz and Cπ = 1 pF, then the upper 3-dB frequency fH of the circuit can be determined.

1. 1.7 Consider the common-emitter amplifier of Fig. P5.159under the following conditions: Rsi„ =
10kQ, Rt =13 kQ, R2 =33kQ, RE = 2.9kQ, Rc = 1.7 kQ° RL = 5.6 kQ, Vcc= 5 V.The dc emitter
current can be shown to be IE = 0.3 mA, atwhich B0 = 120, rB = 300 kQ, and rx = 50 Q. Find
the input
resistanceRinand the midband gain AM . If the transistor isspecified to have = 700 MHz and =
1 pF, find the upper3-dB frequency fH.