Lab 14 TF EIM

The Common Emitter

Circuit

1. Construct the common emitter amplifier circuit below according to your type of emitter.
2. Calculate all the R and C values to use in the circuit such that
   1. [math]I_C \gt 0.5[/math] mA DC with no input signal
   2. [math]V_{CE} \approx V_{CC}/2 \gt 2[/math] V
   3. [math]V_{CC} \lt V_{CE}(max)[/math] to prevent burnout
   4. [math]V_{BE} \approx 0.6 V[/math]
   5. [math]I_D \approx 10 I_B \lt 1[/math] mA
3. Draw a load line using the [math]I_{C}[/math] -vs- [math]I_{CE}[/math] from the previous lab 13. Record the value of [math]h_{FE}[/math] or [math]\beta[/math].
4. Set a DC operating point I^{\prime}_C so it will amplify the input pulse given to you. Some of you will have sinusoidal pulses others will have positive or negative only pulses.
5. Measure all DC voltages in the circuit and compare with the predicted values.
6. Measure the voltage gain [math]A_v[/math] as a function of frequency and compare to the theoretical value.
7. Measure [math]R_{in}[/math] and [math]R_{out}[/math] at about 1 kHz and compare to the theoretical value.
8. Measure [math]A_v[/math] and [math]R_{in}[/math] as a function of frequency with [math]C_E[/math] removed.

Forest_Electronic_Instrumentation_and_Measurement