Chapter 7, Problem 7.52P

For the common−emitter circuit in Figure P7.52, assume the emitter bypass capacitor $C_E$ is very large, and the transistor parameters are: ${\beta }_o=100$ , $V_{BE}\text{(on)=0}\text{.7V}$ , $V_A=\infty$ , $C_{\mu }=2\text{pF}$ , and $f_T=400\text{MHz}$ . Determine the lower and upper 3dB frequencies for the small−signal voltage gain. Use the simplified hybrid− $\pi$ model for the transistor.

Figure P7.52