Reference no: EM132502501 , Length: 2 Pages
Electrical Engineering Assignment - Please complete AC analysis part.
EQUIPMENT - Analog Oscilloscope, DC Power Supply, Function Generator, DMM, 3 2N3903 or 2N2222 NPN silicon BJTs and Various resistors, capacitors.
PROCEDURE -
1. Using the following differential amplifier circuit make the calculations indicated below:
![56_figure.png](https://secure.expertsmind.com/CMSImages/56_figure.png)
a. Assume β = 100 for each transistor.
b. Calculate
VC1 = ____
VC2 =____
IE1 = ____
IE2 = ____
r'e1 = ____
r'e2 = ____
c. Draw the AC model.
i. Calculate the theoretical AV = ____
ii. Calculate theoretical AV(CM) =____
2. Construct the circuit
a. With no input signal adjust the potentiometer to obtain balance between the 2 transistors so that VC1 = VC2.
b. Apply Vin1 = Vin2 = 50mvdc.
i. Measure VC1 = Vout1 = ____
ii. Measure VC2 = Vout2 = ____
c. Repeat step e with Vin1 = Vin2 = -50mvdc.
i. Measure VC1 = Vout1 =____
ii. Measure VC2 = Vout2 =____
d. Remove the dc inputs and apply a common mode ac input Vin1 = Vin2 = 50 mvac. f ≈ 3kHz
i. Measure and the phase shift relative to Vin1
VC1 = Vout1 =____
ii. Measure and the phase shift relative to Vin1
VC2 = Vout2 =____
e. Apply a differential mode ac input Vin1 = 50mv ac and Vin2 = ground.
i. Measure and the phase shift relative to Vin1
VC1 = Vout1 =____
ii. Measure and the phase shift relative to Vin1
VC2 = Vout2 =____
3. Post Lab Questions:
a. From your measured data compute AV(CM) = ____ use RE = 3MΩ recall the current source produces a high reissuance.
b. From your measured data compute AV = ____
c. From you measured data compute the CMRR = ____
4. Properly store any equipment and maintain a neat lab room at all times.
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