The circuit shown in Figure P5.30 is to be designed such that (I_{C Q}=0.8 mathrm{~mA}) and (V_{C

Question:

The circuit shown in Figure P5.30 is to be designed such that $I_{C Q}=0.8 \mathrm{~mA}$ and $V_{C E Q}=2 \mathrm{~V}$ for the case when (a) $R_{E}=0$ and (b) $R_{E}=1 \mathrm{k} \Omega$. Assume $\beta=80$. (c) The transistor in Figure P5.30 is replaced with one with a value of $\beta=120$. Using the results of parts (a) and (b), determine the $Q$-point values $I_{C Q}$ and $V_{C E Q}$. Which design shows the smallest change in $Q$-point values?

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