Vcc
Vcc
R
R
R?
Vo
Q? VCE
VCE
VBE
VBE
R
RE
RE
PLE
(a) Circuit 1
(b) Circuit 2
Figure 1: Circuits for Laboratory Experiment 1
1. Calculate $i_B$, $i_C$, $i_E$, $V_{CB}$ and $V_{CE}$ for the circuit in Figure 1a. Use $R_1 = 18k\Omega$, $R_2 = 5.6k\Omega$, $R_C = 14\Omega$, $R_E = 470\Omega$,
$V_{CC} = 12V$ and $\beta = 100$. Assume $V_{BE} \approx 0.7V$ and $V_T \approx 26mV$.
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2. Construct the circuit in Figure 1a and measure voltages on the circuit. Calculate $i_B$, $i_C$, $i_E$ and $\beta$ by using the
measurements. Compare the results with Question 1.
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3. Calculate $i_B$, $i_C$, $i_E$, $V_{CB}$ and $V_{CE}$ for the circuit in Figure 1b. Use the $\beta$ from Question 2, $R_1 = 18k\Omega$, $R_C = 14\Omega$,
$R_E = 470\Omega$ and $V_{CC} = 12V$. Assume $V_{BE} \approx 0.7V$ and $V_T \approx 26mV$.
4. Construct the circuit in Figure 1b and measure voltages on the circuit. Calculate $i_B$, $i_C$, $i_E$ and $\beta$ by using the
measurements. Compare the results with Question 3.
