For the common-emitter circuit in Figure 7.41 (a) in the text, assume that \(r_{s}=\infty, R_{1} \| R_{2}=5 \mathrm{k} \Omega\), and \(R_{C}=R_{L}=1 \mathrm{k} \Omega\). The transistor is biased at \(I_{C Q}=5 \mathrm{~mA}\) and the parameters are: \(\beta_{o}=200, V_{A}=\infty, C_{\mu}=5 \mathrm{pF}\), and \(f_{T}=250 \mathrm{MHz}\). Determine the upper \(3 \mathrm{~dB}\) frequency for the small-signal current gain.

Figure 7.41(a):-

Transcribed Image Text:

www Vcc Ri RC CC2 HH is CCI HH R (a) www RE CE R